Report of the United States National Museum - United States National Museum (U.S. Govt. Print. Off, 1886)

Report of the United States National Museum - United States National Museum (U.S. Govt. Print. Off, 1887)

Report on bird migration in the Mississippi valley in the years 1884 and 1885 - Merriam, C. Hart (Clinton Hart), 1855 -1942 (Govt. Print. Off, 1888)

Report on the birds of Pennsylvania : with special reference to the food habits, based on over four thousand stomach examinations - Warren, Benjamin Harry, 1858 -1926 (E.K. Meyers, State Printer, 1890)

Report on the birds of Pennsylvania : with special reference to the food habits, based on over three thousand stomach examinations - Pennsylvania. Ornithologist. (E.K. Meyers, State Printer, 1888)

Report on the birds of Pennsylvania. With special reference to the food-habits, based on over four thousand stomach examinations - Pennsylvania. Ornithologist. (E. K. Meyers, state printer, 1890)

Report on the birds of Pennsylvania; with special reference to the food habits, based on over four thousand stomach examinations - Pennsylvania. Ornithologist. (E.K. Meyers, State Printer, 1890)

Report on the fishes, reptiles and birds of Massachusetts - Massachusetts. Zoological; Botanical Survey. (Dutton and Wentworth, State printers, 1839)

Report on the geology, mineralogy, botany, and zoology of Massachusetts - Massachusetts. Geological Survey. (J.S. and C. Adams, 1835)

Report on the ornithology of the Death Valley Expedition of 1891 - United States. Bureau of Biological Survey. (U.S. G.P.O.?], 1893)

Report on the ornithology of the portions of California visited during the field-season of 1875 - Henshaw, Henry W. (Henry Wetherbee), 1850 -1930 (1876)

Report on the progress and condition of the U.S. National Museum for the year ending June 30 ... - United States National Museum (G.P.O, 1915)

Report on the progress and condition of the U.S. National Museum for the year ending June 30 ... - United States National Museum (G.P.O, 1921)

Report on the United States and Mexican boundary survey :made under the direction of the secretary of the Interior - Emory, William H. 1811 -1887 (C. Wendell, printer, 1859)

Report on the zoology of Ohio - Kirtland, J. P. (Jared Potter), 1793 -1877 ([Samuel Medary, Printer to the State], 1892)

Report upon natural history collections made in Alaska between the years 1877 and 1881 - Bean, Tarleton H. (Tarleton Hoffman), 1846 -1916 (Govt. Print. Off, 1887)

Report upon ornithological specimens collected in the years 1871, 1872, and 1873 - Geographical Surveys West of the 100th Meridian (U.S.) (Govt. Print. Off, 1874)

Report upon the Colorado River of the West :explored in 1857 and 1858 - Gray, Asa, 1810 -1888 (Govt. Print. Off, 1861)

Report upon United States Geographical surveys west of the one hundredth meridian - Geographical Surveys West of the 100th Meridian (U.S.) (G.P.O, 1875)

Reports of explorations and surveys : to ascertain the most practicable and economical route for a railroad from the Mississippi River to the Pacific Ocean - Baird, Spencer Fullerton, 1823 -1887 (A.O.P. Nicholson printer, 1855)

Reports of explorations and surveys, to ascertain the most practicable and economical route for a railroad from the Mississippi River to the Pacific Ocean - Baird, Spencer Fullerton, 1823 -1887 (A.O.P. Nicholson, Printer [etc.], 1856)

Reports of explorations and surveys, to ascertain the most practicable and economical route for a railroad from the Mississippi River to the Pacific Ocean - Baird, Spencer Fullerton, 1823 -1887 (A.O.P. Nicholson, Printer [etc.], 1858)

Reports of explorations and surveys, to ascertain the most practicable and economical route for a railroad from the Mississippi River to the Pacific Ocean - Baird, Spencer Fullerton, 1823 -1887 (A.O.P. Nicholson, Printer [etc.], 1853)

Reports of explorations and surveys, to ascertain the most practicable and economical route for a railroad from the Mississippi River to the Pacific Ocean - Baird, Spencer Fullerton, 1823 -1887 (A.O.P. Nicholson, Printer [etc.], 1859)

Reports of explorations and surveys, to ascertain the most practicable and economical route for a railroad from the Mississippi River to the Pacific Ocean - Baird, Spencer Fullerton, 1823 -1887 (A.O.P. Nicholson, Printer [etc.], 1860)

Reports of the Commissioners on the zoological survey of the state - Harris, Thaddeus William, 1795 -1856 (Dutton and Wentworth, state printers, 1838)

Reports on the fishes, reptiles and birds of Massachusetts - Massachusetts. Zoological; Botanical Survey. (Dutton and Wentworth, State Printers, 1839)

Reports on the fishes, reptiles and birds of Massachusetts - Wyman, Jeffries, 1814 -1874 (Dutton and Wentworth, State Printers, 1839)

Response of breeding birds to commercial clearcutting of aspen in southwestern Colorado - Crouch, Glenn LeRoy, 1929 - (1987)

Responses of birds and small mammals to single-tree selection logging in Idaho - Intermountain Research Station (Ogden, Utah) (U.S.D.A. Forest Service, Intermountain Research Station, 1989)

Results of a biological reconnoissance of south-central Idaho - Stejneger, Leonhard, 1851 -1943 (Govt. Print. Off, 1891)

Results of a biological reconnoissance of the Yukon river region. : General account of the region. Annotated list of mammals - Osgood, Wilfred Hudson, 1875 -1947 (Government Printing Office, 1900)

Results of a biological survey of Mount Shasta, California - Merriam, C. Hart (Clinton Hart), 1855 -1942 (Govt Print. Off, 1899)

Results of a biological survey of the San Francisco Mountain region and desert of the Little Colorado, Arizona - Stejneger, Leonhard, 1851 -1943 (Govt. Print. Off, 1890)

Results of a biological reconnoisance of the Yukon river region. General account of the region. Annotated list of mammals - Osgood, Wilfred Hudson, 1875 -1947 (Govt. Print. Off, 1900)

Results of a biological reconnoissance of the Yukon River region - Osgood, Wilfred Hudson, 1875 -1947 (G.P.O, 1900)

Review of American birds, in the Museum of the Smithsonian Institution. Part 1, North and Middle America - Baird, Spencer Fullerton, 1823 -1887 (Smithsonian Institution, 1864)

Review of American birds, in the Museum of the Smithsonian Institution. Part 1, North and Middle America - Baird, Spencer Fullerton, 1823 -1887 (Smithsonian Institution, 1866)

Review of American birds in the Museum of the Smithsonian Institution. Part 1 - Baird, Spencer Fullerton, 1823 -1887 (Smithsonian Institution, 1872)

A review of Prof. George H. Perkins' "A preliminary list of the birds found in Vermont" - Howe, Reginald Heber, Jr. 1875 -1932 (s.n.], 1902)

A review of the birds of Connecticut - Merriam, C. Hart (Clinton Hart), 1855 -1942 (Tuttle, Morehouse & Taylor, Printers, 1877)

A revised catalogue of the birds of Kansas : with descriptive notes of the nests and eggs of the birds known to breed in the state - Goss, N. S. (Nathaniel S.) (Kansas Publishing House, 1886)

A revised catalogue of the birds of Kansas. With descriptive notes of the nests and eggs of the birds known to breed in the state - Goss, N. S. (Nathaniel S.) (Kansas Publishing House, 1886)

Revised list of birds of Central New York - Rathbun, Frank R., (Harvard local name) (Daily Advertiser and Weekly Journal Book and Job Printing House, 1879)

A revised list of the birds of Brookline, Massachusetts - Howe, Reginald Heber, Jr. 1875 -1932 (1902)

Rio Blanco Oil Shale Project. Tract C-a / [c]by Rio Blanco Oil Shale Project. no.8, Progress report - CDM/Limnetics. (Rio Blanco Oil Shale Project, 1974)

Rivista italiana di ornitologia - Museo civico di storia naturale di Milano. (Società italiana di scienze naturali, 1918)

The Rod and the gun (The Rod and Gun, 1875)

Salmon-Challis National Forest noxious weed management program : final environmental impact statement - United States. Forest Service. (U.S. Forest Service, 2003)

Saskatoon Island Provincial Park management plan - Alberta. Alberta Environmental Protection. Natural Resources Service. (Alberta Environmental Protection, Natural Resources Service, 1998)

Save our birds, save our forests - Pacific Northwest Research Station (Portland, Or.) (U.S. Dept. of Agriculture, Forest Serivce, Pacific Northwest Region, 1995)

Science guide - American Museum of Natural History (The Museum, 1944)

Science series / Los Angeles County Museum - Campbell, Kenneth E. Jr. (Kenneth Eugene), 1943 - (Natural History Museum of Los Angeles County, 1943)

Scientific news for general readers; a popular illustrated weekly journal of science (1888)

The Scientific proceedings of the Royal Dublin Society - Royal Dublin Society. (The Society, 1881)

Scottish bird report - Scottish Ornithologists' Club (Scottish Ornithologists' Club, 1993)

Scottish Naturalist - Scottish Natural History Library. (Scottish Natural History Library, 1983)

Scottish Naturalist - Scottish Natural History Library. (Scottish Natural History Library, 1987)

Scottish Naturalist - Scottish Natural History Library. (Scottish Natural History Library, 1994)

The screech owl : its life history and population ecology in northern Ohio - Henny, Charles J. (U.S. Dept. of Interior, Fish and Wildlife Service, 1975)

The Sea swallow - Royal Naval Bird Watching Society. (Printed by W. Spurrell for the Royal Naval Bird Watching Society, 1978)

The Sea swallow - Royal Naval Bird Watching Society. (Printed by W. Spurrell for the Royal Naval Bird Watching Society, 1988)

The second book of birds; bird families - Miller, Harriet Mann, 1831 -1918 (Houghton, Mifflin, 1901)

The sequence of plumages and moults of the passerine birds of New York - Dwight, Jonathan, Jr., 1858 -1929 (New York Academy of Sciences, 1900)

Seventy years of vegetative change in a managed ponderosa pine forest in Western Montana : implications for resource management - Gruell, George E. (U.S. Dept. of Agriculture, Forest Service, Intermountain Forest and Range Experiment Station, 1982)

Sharp eyes; a rambler's calendar of fifty-two weeks among insects, birds and flowers - Gibson, W. Hamilton (William Hamilton), 1850 -1896 (Harper & brothers, 1904)

Sharp eyes; a rambler's calendar of fifty-two weeks among insects, birds and flowers - Gibson, W. Hamilton (William Hamilton), 1850 -1896 (Harper & brothers, 1898)

Sharp eyes; a rambler's calendar of fifty-two weeks among insects, birds, and flowers - Gibson, W. Hamilton (William Hamilton), 1850 -1896 (Harper & Brothers, 1919)

Sharp eyes; a rambler's calendar of fifty-two weeks among insects, birds and flowers - Gibson, W. Hamilton (William Hamilton), 1850 -1896 (Harper, 1892)

Shasta-Trinity National Forests : draft environmental impact statement, land and resource management plan : Humboldt, Modoc, Shasta, Siskiyou, Tehama and Trinity Counties, California - United States. Forest Service. ([San Francisco, Calif.], 1993)

Sierra Club bulletin - Sierra Club. (Sierra Club, 1911)

Significance of white markings in birds of the order Passeriformes - Tracy, Henry Chester, 1876 - (The University press, 1910)

Signs and seasons - Burroughs, John, 1837 -1921 (Houghton, Mifflin, 1895)

Signs and seasons - Burroughs, John, 1837 -1921 (Houghton, Mifflin and Co, 1902)

Signs and seasons - Burroughs, John, 1837 -1921 (Houghton Mifflin and company, 1914)

Sixth annual report of the United States geological survey of the Territories, embracing portions of Montana, Idaho, Wyoming, and Utah : being a report of progress of the explorations for the year 1872 - Geological; Geographical Survey of the Territories (U.S.) (G.P.O, 1873)

Sketch-book of British birds - Sharpe, Richard Bowdler, 1847 -1909 (Society for Promoting Christian Knowledge, 1898)

A sketch of the natural history (vertebrates) of the British Islands. With a concise bibliography of popular works relating to the British fauna, and a list of field clubs and natural history societies in the United Kingdom - Aflalo, Frederick George 1870 -1918 (W. Blackwood and Son, 1898)

Smithsonian miscellaneous collections - Smithsonian Institution (Smithsonian Institution, 1859)

Smithsonian miscellaneous collections - Smithsonian Institution (Smithsonian Institution, 1880)