00341nam a2200121 a 450000500170000008200180001710000170003524500510005226000280010330000260013163000470015763000150020420251202164207.0  a658.4033bBAL  aBall, Robert  aManagement techniques and quantitative methods  aLondonbHeinemannc1984  aix, 293 p.c22cm.bPB  aMathematical techniques of decision making  aManagement