Friedrich K. Scholl
Adolf Adam
Universidad de Londres
Hanswerner Klein
Vieweg
Kybernetische Modelle
Elmar Helten
Deutsche Nationalbibliothek
Private University College of Education of the Diocese of Linz
Cologne Institute for Economic Research
University of Cologne
University of Vienna
Statistics Austria
FH Campus Wien
Institut für Angewandte Statistik
Eckert & Ziegler (United States)
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