Thelen, Herbert Arnold,  1913- <br/><br/>
Dynamics of groups at work / 
by Herbert A. Thelen 
 - Chicago, Ill. :  University of Chicago Press,  1954 
 - 374 p. ;  24 cm. 
<br/><br/><label>ISBN: </label>0226794741 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Social group work