Group development.  

 - Washington,  National Training Laboratories, National Education Association  1961.  
 - vi, 106 p  diagrs  23 cm. 
<br/><br/>Includes bibliographies.  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Group relations training.<br/>Small groups.
<br/><br/><label>LC Class. No.: </label>HM131  / .B68