1
Published: Berlin, Springer, 1984 $ 1983/84
   
4
Published: Hamburg, Springer, 1987
   
5
Published: Nürnberg, Ges. für Konsum-, Markt u. Absatzforschung, 1978
   
6
   
8
   
12
Published: Bonn, Dt. Industrie- u. Handelstag, 1983
   
15
   
20
Published: Berlin, Duncker und Humblot, 1977
   

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