Report on the conservation status of Penstemon lemhiensis, a candidate threatened species : Montana - Montana Natural Heritage Program. (Montana Natural Heritage Program, 1990)

Report on the forest conditions of the Rocky Mountains, and other papers; with a map showing the location of forest areas on the Rocky Mountain range - United States. Department of Agriculture. (Govt. Print. Off, 1889)

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

Report, State Entomologist of Minnesota to the Governor - Minnesota. State Entomologist. (Agricultural Experiment Station, 1920)

Report to the Bureau of Land Management and U.S. Forest Service on raptors inhabiting Brown's Park and the Flaming Gorge National Recreation Area - United States. Bureau of Land Management. ([U.S. Dept. of the Interior, Bureau of Land Management], 1977)

A report upon the boreal flora of the Sierra Nevada of California - Smiley, Frank Jason, 1880 - (University of California Press, 1921)

Reports and papers on botany - Grisebach, A. (August), 1814 -1879 (Printed for the Ray society, 1846)

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.], 1857)

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.], 1854)

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.], 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.], 1860)

Reports of observations and experiments in the practical work of the Division, made under the direction of the Entomologist - United States. Division of Entomology. (U.S. G.P.O, 1883)

The reptiles of western North America, an account of the species known to inhabit California and Oregon, Washington, Idaho, Utah, Nevada, Arizona, British Columbia, Sonora and Lower California - Van Denburgh, John, 1872 -1924 (California Academy of Sciences, 1922)

Research for tomorrow's forests : 1983 research accomplishments - United States. Forest Service. (USDA, Forest Service, 1984)

Research natural areas in Colorado, Wyoming, Nebraska, North Dakota, South Dakota, and parts of Wyoming - Rocky Mountain Forest; Range Experiment Station (Fort Collins, Colo.) (U.S. Dept. of Agriculture, Forest Service, Rocky Mountain Forest and Range Experiment Station, 1994)

Response of juvenile raptors to DDT in the diet - Seidensticker, John. (1966)

Response of western thatching ant (Formica obscuripes) colonies to mechanical shrub crushing and livestock exclusion in Wyoming big sagebrush (Artemisia tridentata wyomingensis) community - United States. Bureau of Land Management. Idaho State Office. ([U.S. Department of the Interior, Bureau of Land Management, Idaho State Office], 2009)

Restoration guidelines for wetlands of the western Prairie Pothole Region - United States. Environmental Protection Agency. (Montana Natural Heritage Program, 2012)

Résultats des campagnes scientifiques accomplies sur son yacht par Albert Ier, prince souverain de Monaco ... - Albert I, Prince of Monaco, 1848 -1922 (Impr. de Monaco, 1912)

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

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)

Resurrection of the Pronotocrepini Knight, with revisions of the Nearctic genera Orectoderus Uhler, Pronotocrepis Knight, and Teleorhinus Uhler, and comments on the Palearctic Ethelastia (Heteroptera, Miridae, Phylinae) - Wyniger, Denise. (American Museum of Natural History, 2010)

The Review of applied entomology Series A Agricultural - C.A.B. International. Bureau of Crop Protection (Commonwealth Agricultural Bureaux, etc, 1915)

The Review of applied entomology Series A Agricultural - C.A.B. International. Bureau of Crop Protection (Commonwealth Agricultural Bureaux, etc, 1917)

The Review of applied entomology Series A Agricultural - C.A.B. International. Bureau of Crop Protection (Commonwealth Agricultural Bureaux, etc, 1918)

The Review of applied entomology Series A Agricultural - C.A.B. International. Bureau of Crop Protection (Commonwealth Agricultural Bureaux, etc, 1921)

A review of black-footed ferret reintroduction in northwest Colorado, 2001-2006 - United States. Bureau of Land Management. White River Field Office. (U.S. Department of the Interior, Bureau of Land Management, White River Field Office, 2008)

Review of Forest service investigations... - United States. Forest Service. (Govt. print. off, 1913)

Review of North American Chlamydatus Curtis species, with new synonymy and the description of two new species (Heteroptera, Miridae, Phylinae) - Schuh, Randall T. (American Museum of Natural History, 2005)

Revisio generum plantarum:vascularium omnium atque cellularium multarum secundum leges nomenclaturae internationales cum enumeratione plantarum exoticarum in itinere mundi collectarum ... - Kuntze, Otto, 1843 -1907 (A. Felix [etc.], 1898)

Revision of Europiella Reuter in North America, with the description of a new genus (Heteroptera, Miridae, Phylinae) - Schuh, Randall T. (American Museum of Natural History, 2004)

A revision of the moth genus Plataea (Lepidoptera, Geometridae) - Rindge, Frederick H. 1921 -1996 (American Museum of Natural History, 1976)

Revision of the plant bug genus Pseudopsallus Van Duzee (Heteroptera, Miridae) - Schwartz, Michael D. (American Museum of Natural History, 1986)

Revisionary studies in the Nearctic Decticinae - Birchim, James D. (Pacific Coast Entomological Society, California Academy of Sciences, 1968)

Revue horticole (Librairie agricole de la maison rustique, 1896)

Rhodora - Robinson, Benjamin Lincoln, 1864 -1935 (New England Botanical Club [etc.], 1936)

Rhodora - Robinson, Benjamin Lincoln, 1864 -1935 (New England Botanical Club [etc.], 1965)

Rhodora - Robinson, Benjamin Lincoln, 1864 -1935 (New England Botanical Club [etc.], 1976)

Rhodora - Robinson, Benjamin Lincoln, 1864 -1935 (New England Botanical Club [etc.], 1978)

Rhodora - Robinson, Benjamin Lincoln, 1864 -1935 (New England Botanical Club [etc.], 1995)

Rhodora - Robinson, Benjamin Lincoln, 1864 -1935 (New England Botanical Club [etc.], 2004)

Riley grazing management program : draft environmental impact statement - United States. Bureau of Land Management. Oregon State Office. (U.S. Department of the Interior, Bureau of Land Management, Oregon State Office, 1982)

Riley Ridge natural gas project : soils/vegetation/reclamation technical report - United States. Bureau of Land Management. (Environmental Research and Technology, Inc, 1983)

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)

Rio Blanco Oil Shale Project progress report 3: section 2.5 other environmental programs - Gulf Oil Corporation. (Rio Blanco Oil Shale Project, 1975)

Riparian and wetland community inventory of 14 reference areas in southwestern Idaho - United States. Bureau of Land Management. (Bureau of Land Management, Idaho State Office, 1998)

Riparian and wetland plant associations of southwestern Idaho : with a focus on the Bureau of Land Management's Lower Snake River District - United States. Bureau of Land Management. (U.S. Dept. of the Interior, Bureau of Land Management, National Science and Technology Center, Information and Communications Group, 2001)