00336nam a2200133 a 450000500170000002000150001708200200003210000170005211000230006924500470009225000120013926000310015130000200018220251203091055.0  a047181802X  a658.72,bD, zen  aZenz, Gary J  aThompson, George H  aPurchasing and the management of materials  a6th ed.  aNew YorkbJohn Wileyc1987  axvi, 542p, 23cm