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The Dartnell sales manager's handbook
Aspley, John Cameron, (1966)
The industrial salesman as a source of market information
Webster jr., Frederick E., (1965)
Interaction and influence processes in personal selling
Davis, Harry L., (1971)
Selling : principles and methods
Pederson, Carlton A., (1981)
Salesmanship : principles and methods
Pederson, Carlton A., (1961)
Top management : a research study of the management policies and practices of fifteen leading industrial corporations
Holden, Paul E., (1968)