Dodd, P W <br/><br/>
Selective punishment early and late in fixed-ratio schedules of food reinforcement.  [electronic resource] 

 -  Journal of the experimental analysis of behavior  May 1977 
 - 443-52 p.  digital 
<br/><br/> Publication Type: Journal Article 
<br/><br/><label>ISSN: </label>0022-5002 
<br/><br/><label>Standard No.: </label>10.1901/jeab.1977.27-443  doi