A guide to aging of pheasant embryos
By: Ronald F. Labisky, James F. Opsahl.
Contributors: Opsahl, James F.; Illinois. Natural History Survey Division
Series: Biological notes -- no. 39
Publisher: State of Illinois, Dept. of Registration and Education, Natural History Survey Division
Published: 1958
Place of publication: Urbana, Ill
Language: eng
Subjects: Pheasants -- Embryology
Notes: Cover title.

"September 1958."

Includes bibliographical references (p. 4).