Hartley, Ruth E. ,    b.1909 <br/><br/>
Understanding children's play /  
by Ruth E. Hartley, Lawrence K. F rank [and] Robert M. Goldenson. 
 - New York :    Columbia University Press,    1952. 
 - 372 p. :    ill. ;    22 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/> Play -- Psychological aspects.<br/> Child psychology.
<br/><br/><label>Dewey Class. No.: </label>155.4