000 00317nam a2200145Ia 4500
100 _aHarper /W.M/ Lim/H.C
942 _cRB
654 _aOperational Recerch
245 _aOperational Recerch
260 _bMacdonald
_aLondon
_c1983
082 _a658.4
_bHar/Lim
300 _a310
546 _aENGLISH
999 _c31582
_d31582