The nature of reinforcement;  a symposium of the Learning Research and Development Center, University of Pittsburgh. 
Edited by Robert Glaser. 
 - New York,  Academic Press,  1971. 
<br/><br/>Includes bibliographies. 
<br/><br/><label>ISBN: </label>0122862504 
<br/><br/><label>LCCN: </label>78171212 //r85 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Motivation in education.<br/>Reinforcement (Psychology)
<br/><br/><label>LC Class. No.: </label>LB1063  / .P57 
<br/><br/><label>Dewey Class. No.: </label>153.1/534