Farner, Donald Stanley <br/><br/>
Photoperiodism in animals 

 - Boston :   Heath and Company,  1964. 
 - 36p.  : ill.   ; 20cm.  
 - BSCS pamphlets; 15 .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Photoperiodism<br/>Animals<br/>habits and behavior of
<br/><br/><label>LC Class. No.: </label>PAM QL753.F35