000			00385nam a2200181Ia 4500
001			943
008			141107s9999 xx 000 0 und d
020			_a0 7121 1534 X
050			_aT 57.6.H37
100			_aHarper W
245			_aOperational Research
250			_a0
260			_aLondon
260			_bEbls
260			_c1979
300			_a,;ill.
650			_aOperation Research
999			_c26865 _d26865