Thelen, Herbert Arnold <br/><br/>
Dynamics of groups at work / 
by Herbert A Thelen 
 - Chicago :  University of Chicago Press,  1954. 
 - 379p. : 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Social group work.
<br/><br/><label>Dewey Class. No.: </label>361.4  / THE