Sabri Ehap H Purchase order management best practices Process,technology,and change management Sabri Ehap H; Gupta Arun P; Beitler Michael A - Fort Lauderdale J R Ross 2007 - xxiii,219p cm. Standard No.: 47380 Source: Textual Subjects--Topical Terms: Industrial Managment Dewey Class. No.: X9:51, P7