Group procedures :  purposes, processes, and outcomes / 
Richard C. Diedrich. 
 - Boston :  Houghton Mifflin,  1972. 
 - 537 p. 
<br/><br/><label>ISBN: </label>0395043646 
<br/><br/><label>Subjects--Uniform Titles: </label><br/>
<br/><br/><label>Subjects--Topical Terms: </label><br/>Group counseling.<br/>Group Psychotherapy.
<br/><br/><label>LC Class. No.: </label>BF637  / .C6  / D5