00390nam a2200109Ia 4500008004100000040003800041100004900079245008200128260003100210300001700241653002200258211228s9999    xx            000 0 und d  cJayakar Knowledge Resource Centre  aManagerial Economics And Operations Research 0aManagerial economics and operations research: a non mathematical introduction  bW W NortonaNew Yorkc1970  axii, 396p p.  aOpertion research