Biological timekeeping 
edited by John Brady 
 - Cambridge  Cambridge University Press  1982 
 - 197p. ill. 24cm 
 - Seminar series/society for Experimental Biology  14 .
<br/><br/> Includes bibliographies and index 
<br/><br/><label>ISBN: </label>0521233070 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Biological rhythms--Congresses<br/>Photoperiodism--Congresses