Walker,Orville C. Marketing Strategy. A Decision -Focused Approach Orville C.Walker - 4th. - New York McGraw Hill Irwin. 2003 - 365p. Paper Cover ISBN: 9780072553932 ISSN: 0072553936 Subjects--Personal Names: Walker,Orville C. LC Class. No.: 658.8,02 Dewey Class. No.: 658.8,02