- Author: Ludwig von Mises
- Language: German
- Year: 2005
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- Year: 1975
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- Year: 1932
- Author: Karl-Theodor Freiherr zu Guttenberg
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- Year: 2009
- Author: Carl Schmitt
- Language: German
- Year: 1974
- Author: Karl-Theodor Freiherr zu Guttenberg
- Language: German
- Year: 2009