Meehl, P E <br/><br/>
Needs (Murray, 1938) and state-variables (Skinner, 1938).  [electronic resource] 

 -  Psychological reports  Apr 1992 
 - 407-50 p.  digital 
<br/><br/> Publication Type: Biography; Historical Article; Journal Article 
<br/><br/><label>ISSN: </label>0033-2941 
<br/><br/><label>Standard No.: </label>10.2466/pr0.1992.70.2.407  doi 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Animals<br/>Conditioning, Operant<br/>Drive<br/>History, 20th Century<br/>Humans<br/>Motivation<br/>United States