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by Schenck, Hermann, Wenzel, Werner, Sindelar, Günter, Spolders, Rudolf
Published 1962
Published 1962
VS Verlag für Sozialwissenschaften
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by Asinger, Friedrich, Fell, Bernhard, Schrage, Klaus, Collin, Gerd
Published 1966
Published 1966
VS Verlag für Sozialwissenschaften