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Marketing : strategic foundations/ Paul S.Busch
Richard D.Irwin, 1975
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Marketing research : methodological foundations
The Dryden Press, 1995
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Brierty, Edward G.
Business marketing
Prentice-Hall, 1998
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Bradley, Frank
Strategic Marketing
John Wiley & Sons, Ltd, 2003
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McCarthy, E. Jerome
Essentials of marketing
Irwin, 1988
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