HOFFMAN, H S <br/><br/>
A RETRACTABLE LEVER FOR USE IN BEHAVIORAL RESEARCH.  [electronic resource] 

 -  Journal of the experimental analysis of behavior  Mar 1964 
 - 163-4 p.  digital 
<br/><br/> Publication Type: Journal Article 
<br/><br/><label>ISSN: </label>0022-5002 
<br/><br/><label>Standard No.: </label>10.1901/jeab.1964.7-163  doi 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Animals<br/>Behavior, Animal<br/>Behavioral Research<br/>Equipment and Supplies