00401    a2200121   450000500170000002000180001708200210003510000200005624500810007626000310015730000680018870000230025620250612141819.0  a0-471-44618-1  aLECT 658.503 JOH  aJOHNSON, L. A.   aOperation research in production planning, scheduling, and inventory control  aNew York, bWiley, c1974.  axiv, 525p.: ill.; chart, figure, graph, table. bIndex.c23cm.   aMONTGOMERY, D. C.