Allen, Gerald R. Cockatiel handbook / [electronic resource] / by Gerald R. Allen and Connie Allen.. — Neptune City, N.J. : : T.F.H. Publications,, c1978.. — 256 p. : : ill. (some col.), map ; 21 cm. Includes indexes. Bibliography: p. 247-249. ISBN: 0876669569 9780876669563 Subjects--Topical Terms: Cockatiel. Dewey Class. No.: 636.686/5