Keys Paul <br/><br/>
Operational research and systems: The systemic nature of operaational research 

 - New York       Plenum          1991 
 - 267p.  cm. 
 - Contemporary systems thinking .
<br/><br/><label>Standard No.: </label>24134 
<br/><br/><label>Source: </label> Textual 
<br/><br/><label>Dewey Class. No.: </label>B2893, N1