Brief an Fr. G. Welcker, Bonn
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In: Brief an Fr. G. Welcker, BonnOhne Ort, 1844 [[ohne Datum, 1844]]Brief an Fr. Gottl. Welcker, Bonn
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Neapel, 28.10.1850 [28 Ottobre 1850]Brief an Professor F. G. Welcker, Roma
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Neapel, 25.02.1847 [25 Febbrajo 1847]Brief an Professor Federico Gottlieb Welcker, Bonn
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Neapel, 06.02.1845 [6 Feb 1845]Brief an Professore F. G. Welcker, Bonn
Neapel, 30.11.1843 [30 Novembre 1843]