Grefen Paul Mastering e-business. Grefen Paul - London Routledge 2010 - xvii,186p cm. ISBN: 2348.7058000000002 Standard No.: 109052 Source: 108, 27/08/2010, Pioneer Book Distributors Textual Subjects--Topical Terms: Financial Studies Dewey Class. No.: X:8:(D6,8(B),2775), Q0