Matthews, B A <br/><br/>
Magnitudes of score differences produced within sessions in a cooperative exchange procedure.  [electronic resource] 

 -  Journal of the experimental analysis of behavior  Mar 1977 
 - 331-40 p.  digital 
<br/><br/> Publication Type: Journal Article 
<br/><br/><label>ISSN: </label>0022-5002 
<br/><br/><label>Standard No.: </label>10.1901/jeab.1977.27-331  doi