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Marketing research : private and public sector decisions
Aaker, David A., (1980)
Handbook of online marketing research
Grossnickle, Joshua, (2001)
Marketingforschung
Baumgarth, Carsten, (1999)
Research for marketing decisions
Green, Paul E., (1988)
Methoden und Techniken der Marketingforschung
Green, Paul E., (1982)
Green, Paul E., (1970)