• Author: Menaker, M. H. Keatts
• Title: Extraretinal light perception in the sparrow. II. Photoperiodic stimulation of testis growth
• Year: 1968
• Reference Type: Journal Article
• Journal/Book Title: Proc Natl Acad Sci U S A
• Volume: 60
• Issue: 1
• Pages: 146-51
• Date of Publication: Friday, 20 December 1968