Collins Lyndhurst Ed. <br/><br/>
Use of models in the social sciences. 

 - London  Tavistock Publications        1976 
 - x,238p  cm. 
<br/><br/><label>Standard No.: </label>33457 
<br/><br/><label>Source: </label> Textual 
<br/><br/><label>Dewey Class. No.: </label>Sigma:(B), L6