Harnack, R. Victor <br/><br/>
Group discussion theory and technique   
by R. Victor Harnack and Thorrel B. Fest 
 - New York  Appleton - Century Croft  1964 
 - xiv, 456p    incl. ind. 
<br/><br/><label>Dewey Class. No.: </label>301.185  / N64