Shapiro, Carl Information rules : a strategic guide to the network economy / Carl Shapiro and Hal R. Varian - Boston : Harvard Business School Press, c1999. - x, 352 p. : ill. ; 25 cm. ISBN: 087584863X LCCN: Subjects--Topical Terms: Information technologyEconomic aspec Information society LC Class. No.: HC79 / .I55S53 1999 Dewey Class. No.: 658.4038 / S529i