UNESCO <br/><br/>
Problems of formalization in the social sciences. 

 - Wroclaw  Polskiej Akademii nauk       1977 
 - 255p  cm. 
<br/><br/><label>Standard No.: </label>33330 
<br/><br/><label>Source: </label> Textual 
<br/><br/><label>Dewey Class. No.: </label>Sigma:(B), L7