Abelson, Robert P. <br/><br/>
Differences between belief and knowledge systems+ / Robert -P. Abelson 

 - [s.l.] : Cognitive Science Society 
 - [12] p. 
<br/><br/> "+This paper is a slightly revised version of a symposium t-alk delivered at the First Annual Meeting of the Cognitive -Science Society".En: Cognitive science 3, 355-366 (1979)