Thelen Herbert Arnold  1913 <br/><br/>
Dynamics of groups at work / 
Herbert Arnold Thelen . 
 - Chicago,   University of Chicago Press :  1967. 
 - 379 p.  24 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Social group work
<br/><br/><label>LC Class. No.: </label>HM131