- Author: Theodor Siebs (editor), Helmut de Boor (editor)
- Language: German
- Year: 1958
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- Year: 2015
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- Language: German
- Year: 1984
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- Language: German
- Year: 1965
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- Year: 1978
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- Year: 1998
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- Year: 1969
- Author: Theodor Siebs Helmut de Boor Paul Diels
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- Year: 1961
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- Language: German
- Year: 1969
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- Year: 1966