Media type: E-Article Title: Biological Timekeeping.John Brady Contributor: Edmunds,, Leland N. imprint: University of Chicago Press, 1983 Published in: The Quarterly Review of Biology Language: English DOI: 10.1086/413211 ISSN: 0033-5770; 1539-7718 Keywords: General Agricultural and Biological Sciences Origination: Footnote: