Birney Robert C <br/><br/>
Reinforcement , an enduringng problem in psychology  
Birney Robert C; Teevan Richard Ed. 
 - Princeton  N J Van Nostrand         1961 
 - viii, 230p  cm. 
<br/><br/><label>Source: </label> General Book 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Psychology
<br/><br/><label>Dewey Class. No.: </label>S:431, K1