Occasional papers of the California Academy of Sciences - California Academy of Sciences (California Academy of Sciences, 1979)

Occasional papers of the California Academy of Sciences - California Academy of Sciences (California Academy of Sciences, 2010)

Occasional papers of the California Academy of Sciences - California Academy of Sciences (California Academy of Sciences, 2013)

Oceanic birds of South America : a study of species of the related coasts and seas, including the American quadrant of Antarctica, based upon the Brewster-Sanford collection in the American Museum of Natural History - Jaques, Francis Lee, 1887 -1969 (Macmillan Co, 1936)

Official lists and indexes of names and works in zoology - International Commission on Zoological Nomenclature (ICZN, 1987)

Official lists and indexes of names and works in zoology. Supplement 1986-2000 - International Commission on Zoological Nomenclature (International Trust for Zoological Nomenclature, c/o Natural History Museum, 2001)

On the development of the skeleton of the tuatara, Sphenodon punctatis ; with remarks on the egg, on the hatching, and on the hatched young - Howes, George Bond, 1853 -1905 (Printed for the Society, sold at their house in Hanover Square, 1901)

On the development of the skeleton of the Tuatara, Sphenodon punctatus ; with remarks on the egg, on the hatching and on the hatched young - Howes, George Bond, 1853 -1905 (s.n, 1901)

On the jaw muscles of ankylosaurs - Haas, Georg, 1905 -1981 (American Museum of Natural History, 1969)

On the phylogeny of hair - Elias, Hans, 1907 -1985 (American Museum of Natural History, 1957)

On the reptiles and batrachians - Garman, Samuel, 1843 -1927 (Printed for the Museum?, 1883)

On the reptiles and Batrachians of North America - Garman, Samuel, 1843 -1927 (Major, Johnston & Barrett, Yeoman, 1883)

On the structure and development of the skull of the common frog (Rana temporaria, L.) - Parker, William Kitchen William Kitchen Parker 1823 -1890 (Royal Society, 1871)

On the structure and development of the vertebral column of Amia - Hay, Oliver Perry, 1846 -1930 (1895)

On the trigeminus muscles of the lizards Xenosaurus grandis and Shinisaurus crocodilurus - Haas, Georg, 1905 -1981 (American Museum of Natural History, 1960)

The ontogeny and phylogeny of the sternum - Hanson, Frank Blair, ([publisher not identified], 1919)

Opinions and declarations rendered by the International Commission on Zoological Nomenclature - International Commission on Zoological Nomenclature (Printed by order of the International Trust for Zoological Nomenclature, 1957)

Opinions and declarations rendered by the International Commission on Zoological Nomenclature - International Commission on Zoological Nomenclature (Printed by order of the International Trust for Zoological Nomenclature, 1959)

The orders of mammals - Gregory, William K. (William King), 1876 -1970 (The Trustees, 1910)

Organization of repetitive DNA in the primitive reptile (Sphenodon Punctatus) - Van Den Bussche, Ronald A. (Museum of Texas Tech University, 1998)

The origin and evolution of life : on the theory of action, reaction and interaction of energy - Osborn, Henry Fairfield, 1857 -1935 (Scribner's, 1918)

Ornithologische Monatsschrift - Deutscher Verein zum Schutze der Vogelwelt. (Kommissions-Verlag der Creutschen Verlagsbuchhandlung, 1918)

Osteology of the carnivorous Dinosauria in the United States National museum : with special reference to the genera Antrodemus (Allosaurus) and Ceratosaurus - Gilmore, Charles W. (Charles Whitney), 1874 -1945 (Govt. print. off, 1920)