Beck, Stanley D. <br/><br/>
Animal photoperiodism :  relationship of daylength to animal growth, development, and behavior / 
Stanley, D. Beck. 
 - New York :  Rinehart and Winston,  1963. 
 - 124 p. :  ill. ;  20 cm. 
<br/><br/>Bibliography : p. 117-118. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Photoperiodism.<br/>Animal behavior.