Trecker, Harleigh Bradley,  1911- <br/><br/>
Social group work :  principles and practices / 
by Harleigh B. Trecker 
 - New York :  Whiteside,  1955 
 - x, 470 p. :  ill.;  22 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Socialism<br/>Social group work