by W. Baumann, G. v. Bergmann, J. Brinck, A. Gigon, N. Henning, H. Kalk, G. Katsch, M. Lüdin, O. Merkelbach, O. Müller, H. Schwiegk, F. Stroebe, R. Staehlin, V. Salle
1938
by A. Bittorf, A. Gigon
2013
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