Valentine, C. W.  <br/><br/>
Difficult child and the problem of discipline /  
C. W. Valentine  
 - 1 ed. 
 - s.l. :   Methuen,   c/1940 
 - 106 p. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Psicología-Niños
<br/><br/><label>Dewey Class. No.: </label>136.7 V23