The psychology of play activities/ 
by Harvey C. Lehman and Paul A. Witty. 
 - New York:  Arno Press,  1976 
 - 242 p. :   ill. ;   24 cm. 
 - Studies in play and games. .
<br/><br/> Reprint of the 1927 ed. published by A. S. Barnes, New York. 
<br/><br/><label>ISBN: </label>0405079249 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Child psychology.<br/>Play.