Wingate, John W.
Fundamentals of selling
South-Western Publishing, 1959
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Allen, Robert Y.
Selling dynamics
McGraw-Hill, 1984
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Sutton, Kelso
The technique of selling
McGraw-Hill, 1949
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Kurtz, David L.
Professional selling
Business Publications, 1982
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Buskirk, Richard Hobart, 1927-
Selling : principles and practices
McGraw-Hill, 1992
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