Oesterreichische botanische Zeitschrift (A. Skofitz, 1870)

Oesterreichische botanische Zeitschrift (A. Skofitz, 1873)

Oesterreichische botanische Zeitschrift (A. Skofitz, 1877)

Oesterreichische botanische Zeitschrift (A. Skofitz, 1880)

Oesterreichische botanische Zeitschrift (A. Skofitz, 1881)

Oesterreichische botanische Zeitschrift (A. Skofitz, 1885)

Oesterreichische botanische Zeitschrift (A. Skofitz, 1886)

Oesterreichische botanische Zeitschrift (A. Skofitz)

Oesterreichische botanische Zeitschrift (A. Skofitz, 1888)

Oesterreichische botanische Zeitschrift (A. Skofitz, 1892)

Oesterreichische botanische Zeitschrift (A. Skofitz, 1898)

Oesterreichische botanische Zeitschrift (A. Skofitz, 1899)

Oesterreichische botanische Zeitschrift (A. Skofitz, 1905)

Oesterreichische botanische Zeitschrift (A. Skofitz, 1918)

Oesterreichisches botanisches Wochenblatt ([L.W. Seidel], 1851)

Oesterreichisches botanisches Wochenblatt ([L.W. Seidel], 1852)

Oesterreichisches botanisches Wochenblatt ([L.W. Seidel], 1853)

Oesterreichisches botanisches Wochenblatt ([L.W. Seidel], 1855)

Öfversigt af Kongl. Vetenskaps-akademiens forhandlingar - Kungl. Svenska vetenskapsakademien. (P. A. Norstedt & Söner, 1882)

The Ohio journal of science - Ohio Academy of Science. (Ohio Academy of Science, 1909)

The Ohio naturalist - Ohio Academy of Science. (Biological Club of the Ohio State University, 1904)

The Ohio naturalist - Ohio Academy of Science. (Biological Club of the Ohio State University, 1905)

The Ohio naturalist - Ohio Academy of Science. (Biological Club of the Ohio State University, 1903)

The Ohio naturalist - Ohio Academy of Science. (Biological Club of the Ohio State University, 1909)

The Ohio naturalist - Ohio Academy of Science. (Biological Club of the Ohio State University, 1910)

The Ohio naturalist - Ohio Academy of Science. (Biological Club of the Ohio State University, 1911)

L'Oiseau et la Revue francaise d'ornithologie - Société ornithologique de France. (Société ornithologique de France, 1934)

On molecular and microscopic science - Somerville, Mary Fairfax, 1780 -1872 (J. Murray, 1869)

On molecular and microscopic science - Somerville, Mary, 1780 -1872 (J. Murray, 1869)

On the fauna and flora of the west of Scotland. Meeting at Glasgow, September, 1876 - British Association for the Advancement of Science. (Blackie, 1876)

On the forms and structure of fern-stems - Ogilvie, George, 1820 -1886 (Taylor and Francis, 1859)

On the germination, development, and fructification of the higher Cryptogamia : and on the fructification of the Coniferæ - Hofmeister, Wilhelm, 1824 -1877 (Published for the Ray Society, by Robert Hardwicke, 1862)

On the germination, development, and fructification of the higher Cryptogamia, and on the fructification of the Coniferae - Hofmeister, Wilhelm, 1824 -1877 (Pub. for the Ray society by R. Hardwicke, 1862)

On the natural history of the Gulf of St. Lawrence and the distribution of the Mollusca of Eastern Canada - Bell, Robert, 1841 -1917 (s.n.], 1859)

On the popular names of British plants : being an explanation of the origin and meaning of the names of our indigenous and most commonly cultivated species - Prior, R. C. Alexander (Richard Chandler Alexander), 1809 -1902 (F. Norgate; [etc., etc.], 1879)

On the popular names of British plants, being an explanation of the origin and meaning of the names of our indigenous and most commonly cultivated species - Prior, R. C. Alexander (Richard Chandler Alexander), 1809 -1902 (Williams & Norgate, 1863)

On the popular names of British plants, being an explanation of the origin and meaning of the names of our indigenous and most commonly cultivated species - Prior, R. C. Alexander (Richard Chandler Alexander), 1809 -1902 (Williams and Norgate, 1870)

One thousand objects for the microscope - Cooke, M. C. (Mordecai Cubitt), 1825 -1914 (F. Warne, 1869)

One thousand objects for the microscope - Cooke, M. C. (Mordecai Cubitt), 1825 -1914 (Frederick Warne, 1869)

The Ontario natural science bulletin - Wellington Field Naturalists' Club. (Wellington Field Naturalists' Club, 1907)

The Ontario natural science bulletin - Wellington Field Naturalists' Club. (Wellington Field Naturalists' Club, 1912)

Ootheca Wolleyana: an illustrated catalogue of the collection of birds' eggs - Newton, Alfred, 1829 -1907 (sold by R. H. Porter, 1907)

The Orchid review (Orchid Review ltd.], 1910)

The Orchid review (Orchid Review ltd.], 1912)

Orchidophile; journal des amateurs d'orchideés - Godefroy-Lebeuf, A. (Alexandre), 1844 -1903 (1881)

The orchids in the Ottawa District : floristics, phytogeography, population studies and historical review / Joyce M. Reddoch and Allan H. Reddoch - Ottawa Field-Naturalists' Club (The Ottawa Field-Naturalists' Club, 1997)

Orchis :Monatsschrift der Deutschen Gesellschaft für Orchideenkunde - Dammer, Udo. (1910)

Oréades - Instituto de Ciências Biológicas da UFMG. Departamento de Botânica. (Departamento de Botânica, U.F.M.G, 1970)

Organic materia medica : including the standard remedies of the leading pharmacopoeas as well as those articles of the newer materia medica ... and of the preparations made therefrom by Parke, Davis & Co. ... - Parke, Davis & Company ([s.n.], 1888)

Organic remains of a former world : an examination of the mineralized remains of the vegetables and animals of the Antediluvian world; generally termed extraneous fossils - Parkinson, James, 1755 -1824 (M.A. Nattali, 1833)

Organic remains of a former world. An examination of the mineralized remains of the vegetables and animals of the antediluvian world; generally termed extraneous fossils - Parkinson, James, 1755 -1824 (Sherwood, Neely and Jones, etc, 1811)

Organographie der Pflanzen, insbesondere der Archegoniaten und Samenpflanzen - Goebel, K. (Karl), 1855 -1932 (G. Fischer, 1913)

Organographie der Pflanzen, insbesondere der Archegoniaten und Samenpflanzen - Goebel, K. (Karl), 1855 -1932 (G. Fischer, 1898)

Organographie der Pflanzen, insbesondere der Archegoniaten und Samenpflanzen - Goebel, K. (Karl), 1855 -1932 (G. Fischer, 1915)

Organography of plants, especially of the Archegoniata and Spermaphyta - Balfour, Isaac Bayley, 1853 -1922 (Clarendon press, 1900)

Organography of plants, especially of the archegoniatae and spermaphyta - Goebel, K. (Karl), 1855 -1932 (Clar. Press, 1900)

The origin of a land flora : a theory based upon the facts of alternation - Bower, F. O. (Frederick Orpen), 1855 -1948 (Macmillan, 1908)

The origin of a land flora : a theory based upon the facts of alternation - Bower, F. O. (Frederick Orpen), 1855 -1948 (Macmillan and co., limited, 1908)

The origin of a land flora, a theory based upon the facts of alternation - Bower, F. O. (Frederick Orpen), 1855 -1948 (Macmillan and Co., Ltd, 1908)

The origin of the British flora - Reid, Clement, 1853 -1916 (Dulau, 1899)

Florist's journal (How and Parsons, 1848)

Ornithologische Monatsschrift - Deutscher Verein zum Schutze der Vogelwelt. (Kommissions-Verlag der Creutschen Verlagsbuchhandlung, 1911)

Ornithologische Monatsschrift - Deutscher Verein zum Schutze der Vogelwelt. (Kommissions-Verlag der Creutschen Verlagsbuchhandlung, 1921)