Beck, Stanley <br/><br/>
Animal photoperiodism; relationship of daylength to animal growth, development and behavior 

 - New York  Holt, Rinehart and Winston  1963 
 - 124p.  20cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Photoperiodism
<br/><br/><label>LC Class. No.: </label>QP82.B4