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Optimale Werbebudget- und Werbeprogrammplanung
Benz, Jochen, (1981)
Marketing, sales promotion, and advertising
Nolan, Carroll Anthony, (1965)
Werbewirkung und Werbeerfolgskontrolle
Meyer, Paul Werner, (1965)
The influence of price on the North Atlantic airline market
Wallace, W. M., (1968)
Let's test fares scientifically?
Wallace, W. M., (1964)