Johanson, C E <br/><br/>
Commonalities and differences among reinforcers.  [electronic resource] 

 -  NIDA research monograph  Jul 1981 
 - 235-7 p.  digital 
<br/><br/> Publication Type: Journal Article 
<br/><br/><label>ISSN: </label>1046-9516 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Animals<br/>Disease Models, Animal<br/>Drug Evaluation, Preclinical<br/>Humans<br/>Reinforcement, Psychology<br/>Self Administration<br/>Substance-Related Disorders