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by Rheinische Aktiengesellschaft für Braunkohlenbergb
Published 1956
Subjects:
“...Engineering, general...”Published 1956
VS Verlag für Sozialwissenschaften
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by Schmidt, Volker, Kollbach, Dietbert, Metzler, Hans-Georg, Pangritz, Heiko
Published 1981
Subjects:
“...Engineering, general...”Published 1981
Vieweg+Teubner Verlag