Ziegenfuss, W., author
Berlin de Gruyter 1949
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Metzke, E., author
Heidelberg Kerle 1949
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Julia, Didier, author
Paris, Librairie Larousse
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Brugger S.J., Walter, author
Wieh Herder 1948
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Vierkandt, Alfred, 1867-1953, author
Stuttgart, Ferdinand Enke Verlag
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