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1
by Bingel, Rudolf, Bumm, Hellmut, von Buol, Heinrich, Fellinger, Rob
Published 1938
Springer Berlin Heidelberg
Subjects: “...Popular Science, general...”
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2
by Bingel, Rudolf, von Borries, Bodo, Büssem, Wilhelm, von Boul, Heinrich
Published 1938
Springer Berlin Heidelberg
Subjects: “...Popular Science, general...”