000			00293nam a2200133Ia 4500
008			160316s1975 xxu||||| |||| 00| 0 eng d
020			_a
100			_aHarper , W
245			_aOperational Research.
250			_a
260			_aLONDON _bMACDONALD& EVANS _c1975
300			_a301
700			_a _a
999			_c20971 _d20971