Wolfgang, Charles H. <br/><br/>
Helping aggressive and passive preschoolers through play / 
Charles H. Wolfgang. 
 - Columbus :  Charles E. Merril Publishing Company,  1977. 
 - iv, 108 p. :  ill. ;  23 cm. 
<br/><br/>Includes index and  bibliography : p. 99-104. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Education, Preschool.<br/>Play.<br/>Aggressiveness (Psychology) in children.<br/>Passivity (Psychology) in children.<br/>Child psychology.