Comparative direct electrography of the heart of vertebrates

Bibliography: p.44-50.

The fishes of North and Middle America: a descriptive catalogue of the species of fish-like vertebrates found in the waters of North America, north of the Isthmus of Panama /

Mode of access: Internet.

Natural history of vertebrates (except birds); a laboratory and field guide.

Pages 25, 26, 41, 44, 45, 46, 47, 48, 68 and 80 are repeated.

Field notes on vertebrates collected by the Smithsonian-Chrysler East African expedition of 1926,

Proceedings of the United States National Museum, v. 73, no. 17.

A manual of mesostigmatid mites parasitic on vertebrates,

Bibliography: p. 271-316.

Manual of the vertebrates of the northern United States, including the district east of the Mississippi River, and north of North Carolina and Tennessee, exclusive of marine species.

Mode of access: Internet.

Outlines of comparative anatomy of vertebrates /

Includes index.

Sexual endocrinology of non-mammalian vertebrates,

Mode of access: Internet.

A laboratory and field guide to the natural history of vertebrates (except birds) /

"References" included.

Natural history of vertebrates : (except birds) A laboratory and field guide. Rev /

"First edition, copyrighted 1932."

Winners in life's race, or, The great backboned family.

Includes index.

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Mode of access: Internet.

Smithsonian scientific series.

"A promise kept" (4p.) 23 cm. loose in vol. 1.

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Mode of access: Internet.

Naturgeschichte der Wirbelthiere /

Índice.