Slovenko, Ralph. <br/><br/>
Motivations in play, games and sports / 
edited by Ralph Slovenko and James A. Knight ;wWith a pref. by Karl A. Menninger. 
 - Springfield :  Charles C. Thomas,  1967. 
 - xxxix, 745 p. :  ill. ;  26 cm. 
<br/><br/>Includes bibliographical references and index. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Play.