Thelen, Herbert Arnold,  1913- <br/><br/>
Dynamics of groups at work / 
by Herbert Arnold Thelen. 
 - Chicago :  University of Chicago Press,  1954. repr. 1960. 
 - 379 p. ;  24 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Social group work.
<br/><br/><label>Dewey Class. No.: </label>361.4 THE