Cravens, R W <br/><br/>
Conditioned appetitive drive states: empirical evidence and theoretical status.  [electronic resource] 

 -  Psychological bulletin  Mar 1970 
 - 212-20 p.  digital 
<br/><br/> Publication Type: Journal Article 
<br/><br/><label>ISSN: </label>0033-2909 
<br/><br/><label>Standard No.: </label>10.1037/h0028685  doi 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Animals<br/>Appetitive Behavior<br/>Avoidance Learning<br/>Conditioning, Operant<br/>Discrimination, Psychological<br/>Drive<br/>Hunger<br/>Thirst