Author: Kellogg, Remington & E.Bostelmann.
Title: Whales, Giants of the sea & Whales, Porpoises, and Dolphins.
Description: Washington, 1940. 35-90 pp. Illustr. Soft cover. (Nat. Geogr. Magazine Jan. 1940).

Keywords: Periodical National Geographic Magazine Sea Mammals Dolfin Whales Tijdschriften Zeezoogdieren Dolfijnen Walvissen