The parakeet handbook /
Wolter, Annette.
Birmelin, I.(Immanuel)
Birmelin, I.(Immanuel)New parakeet handbook.
Hauppauge, N.Y. : Barron's,
2000.
Rev. ed. of: New parakeet handbook / I. Birmelin and A. Wolter. 1st English language ed., 1986.
Includes bibliographical references (p. 146-147).
Budgerigar.