Ellis David O. <br/><br/>
Systems philosophy 
Ellis David O.; Ludwig Fred J. 
 - New Jersey   Prentice Hall          1962 
 - xi, 387p.  cm. 
 - Space technology .
<br/><br/><label>Source: </label> General Book 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Operational Management
<br/><br/><label>Dewey Class. No.: </label>X:8:(B2893), K2