00303nam a2200121Ia 4500008004100000082001300041082001000054100001800064245004900082260001000131260003100141260000900172230118s9999||||xx |||||||||||||| ||und||  a658.4033  bGOP/Q  agbgopikuttan 0aquantitative methods and operations research  adelhi  bhimalaya publishing house   c1987