Wilkie, D M <br/><br/>
Effect of delay-interval stimuli on delayed symbolic matching to sample in the pigeon.  [electronic resource] 

 -  Journal of the experimental analysis of behavior  Mar 1981 
 - 153-60 p.  digital 
<br/><br/> Publication Type: Journal Article 
<br/><br/><label>ISSN: </label>0022-5002 
<br/><br/><label>Standard No.: </label>10.1901/jeab.1981.35-153  doi