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Salesmanship : principles and methods
Pederson, Carlton A., (1966)
The Dartnell sales manager's handbook
Aspley, John Cameron, (1966)
The industrial salesman as a source of market information
Webster jr., Frederick E., (1965)
Behavioral and management science in marketing
Davis, Harry L., (1978)
A cross national comparison of the reliability of selected measurements from consumer surveys
Davis, Harry L., (1980)
Measurement of husband-wife influence in consumer purchase decisions
Davis, Harry L., (1971)