Photoperiodism and related phenomena in plants and animals;  proceedings, 
edited by Robert B. Withrow, with the cooperation of Arthur C. Giese [and others]. 
 - Washington  ,  American assiociation :  1959. 
 - xvii, 903 p. :  illus., diagrs., tables. ;  24 cm. 
 - American Association for the Advancement of Science. Publication  no. 55 .
 -  no. 55. Publication (American Association for the Advancement of Science) ; .
<br/><br/>Includes bibliographies and index. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Photoperiodism--Congresses.
<br/><br/><label>Dewey Class. No.: </label>574.52  / PHO