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Redmayne and Week's Market research
Redmayne, Paul, (1951)
Basic marketing : a managerial approach
McCarthy, Edmund Jerome, (1962)
Produktpositionierung
Mayer, Ralf Ulrich, (1984)
Sales administration, principles and problems
Canfield, Bertrand R., (1956)
Die Verbraucherschutz-Bewegung in USA
Canfield, Bertrand R., (1953)
Public relations : principles, cases, and problems
Canfield, Bertrand R., (1973)