• Author: Pittendrigh, C.S. J. H. Eichhorn D. H. Minis V. G. Bruce
• Title: Circadian systems, VI. Photoperiodic time measurement in Pectinophora gossypiella
• Year: 1970
• Reference Type: Journal Article
• Journal/Book Title: Proc Natl Acad Sci U S A
• Volume: 66
• Issue: 3
• Pages: 758-64
• Date of Publication: Sunday, 20 December 1970