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1by Bechthold, Sabine, Elbel, Günther, Hannappel, Heinz-Peter
Published in Wirtschaft und Statistik (2005)Classmark: 271Article -
2by Egner, Ute, Hannapel, Heinz-Peter, Hannappel, Heinz-Peter
Published in Wirtschaft und Statistik (2004)Classmark: 271Article