Beckmann M <br/><br/>
Lecture notes in economics and mathematical systems 

 - New York  1979 
 - 196p  cm. 
<br/><br/><label>ISBN: </label>3540091211 
<br/><br/><label>Source: </label> General Book 
<br/><br/><label>Dewey Class. No.: </label>X:326, L9