LOTHAR KERCK <br/><br/>
OPERATIONAL PROBLEM SOLVING  Textual Documents  
LOTHAR KERCK 
 - 1st 
 - canada  John wiley & Sons Ltd 
 - 165 
<br/><br/><label>ISBN: </label>0-471-43209-1   
<br/><br/><label>Subjects--Index Terms: </label>food Producation