Lofts, Brian. <br/><br/>
Animal photoperiodism / 
B. Lofts. 
 - London :  Arnold ,  1970. 
 - 64p. :  ill., plates ;  23cm. 
 - Institute of Biology. Studies in biology, ;  no. 25. .
<br/><br/>Includes bibliography. 
<br/><br/><label>ISBN: </label>0713122943. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Photoperiodism.
<br/><br/><label>Dewey Class. No.: </label>591.18 LOF