00269nam a2200109Ia 4500008004100000041000800041082001600049100001300065245003800078260003500116300000800151211209s1979    xx            000 0 und d  aeng  a658.403 GHO  aGHOSAL A  aELEMENTS OF OPERATIONAL RESEARCH   bS CHAND AND COMPANY LTD.c1979  a298