On the history and natural arrangement of insects - Shuckard, William Edward, 1802 -1868 (Printed for Longman, Brown, Green & Longman's Paternoster Row, 1840)

On the history and natural arrangement of insects - Shuckard, William Edward, 1802 -1868 (Printed for Longman, Orme, Brown, Green, & Longmans [etc.], 1840)

On Turritopsis nutricula (McCrady) - Brooks, William Keith, 1848 -1908 (1907)

Ophiures de l'expédition du Siboga ... - Koehler, R. (René) 1860 -1931 (Librairie et imprimerie ci-devant E. J. Brill, 1904)

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, 1958)

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)

Ordovician fossils of north China - Grabau, Amadeus W. (Amadeus William), 1870 -1946 (Published by the Geological Survey of China, 1922)

The ore deposits of Utah - Heikes, V. C. (Victor Conrad), 1867 - (Govt. Print. Off, 1920)

The Oregon naturalist (Naturalist Pub. Co, 1896)

Ornithological notes - Herrick, C. L. (Clarence Luther), 1858 -1904 (Geological and Natural History Survey of Minnesota, 1877)

Ostracoda - Müller, Gustav Wilhelm, 1857 - (Gustav Fischer, 1905)

Die ostracoden der Siboga-expedition - Müller, Gustav Wilhelm, 1857 - (Buchhandlung und druckerei vormals E. J. Brill, 1906)

Die ostracoden des golfes von Neapel und der angrenzenden meeres-abschnitte - Müller, Gustav Wilhelm, 1857 - (R. Friedlander, 1894)

The Ottawa naturalist - Ottawa Field-Naturalists' Club (Ottawa Field-Naturalists' Club, 1888)

The Ottawa naturalist - Ottawa Field-Naturalists' Club (Ottawa Field-Naturalists' Club, 1887)

The Ottawa naturalist - Ottawa Field-Naturalists' Club (Ottawa Field-Naturalists' Club, 1889)

The Ottawa naturalist - Ottawa Field-Naturalists' Club (Ottawa Field-Naturalists' Club, 1890)

The Ottawa naturalist - Ottawa Field-Naturalists' Club (Ottawa Field-Naturalists' Club, 1892)

The Ottawa naturalist - Ottawa Field-Naturalists' Club (Ottawa Field-Naturalists' Club, 1895)

The Ottawa naturalist - Ottawa Field-Naturalists' Club (Ottawa Field-Naturalists' Club, 1896)