Thomas, D R <br/><br/>
Factors affecting conditional discrimination learning by pigeons.  [electronic resource] 

 -  Journal of the experimental analysis of behavior  Sep 1987 
 - 277-87 p.  digital 
<br/><br/> Publication Type: Journal Article 
<br/><br/><label>ISSN: </label>0022-5002 
<br/><br/><label>Standard No.: </label>10.1901/jeab.1987.48-277  doi