The first five years of life :  a guide to the study of the preschool child, from the Yale clinic of child development / 
edited by Arnold Halverson 
 - New York :  Harper,  1940 
 - xiii, 58 p. :  ill. ;  24 cm. 
<br/><br/> "First edition." 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Child psychology<br/>Psychophysiology<br/>Learning, psychology of