Keller, Fred Simmons,  1899- <br/><br/>
Learning :  Reinforcement theory / 
[By] Fred S. Keller. 
 - New York :  Random House,  [1965]. 
 - 36 p. :  ill. 
 - A Random House study in psychology  PP13 .
<br/><br/>Bibliogr.: p. 81. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Learning, Psychology of.