Lofts, Brian. <br/><br/>
Animal photoperiodism. 

 - London :  Arnold,  1970. 
 - Institute of Biology. Studies in biology ;  no. 25 .
 - Institute of Biology's studies in biology ;  no. 25. .
<br/><br/>Bibliography: p. [63-64]. 
<br/><br/><label>ISBN: </label>0713122943  L.0.60 
<br/><br/><label>LCCN: </label>78858349 //r86 
<br/><br/><label>Nat. Bib. No.: </label>B71-00118 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Photoperiodism.
<br/><br/><label>LC Class. No.: </label>QP82.2.L5  / L6 
<br/><br/><label>Dewey Class. No.: </label>591.1/823