Bertcher, Harvey J. <br/><br/>
Group participation :  techniques for leaders and members / 
Harvey J. Bertcher. 
 - Beverly Hills :  SAGE Publications,  1979. 
 - 179 p. :  ill. ;  22 cm. 
 - Sage human services guides ;  no.10. .
<br/><br/>includes bibliographical references and index. 
<br/><br/><label>ISBN: </label>0803912048 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Small groups.<br/>Social groups.<br/>Social participation.<br/>Leardership.