1.
Hugo Schuchardt an Graziadio Isaia Ascoli (001-B37_60)
2.
The journal of Hendrik Jacob Wikar 1779 / with an English translation by A.W. van der Horst. The journals of Jacobus Coetsé Jansz 1760 and Willem van Reenen 1791
Valonština v Belgii: současná situace jazyka ; Walloon in Belgium : current situation of the language
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9.
Richard Riegler an Hugo Schuchardt (11-09598)
Hugo Schuchardt an Reinhold Köhler (006-S.11-14)
Valonština v Belgii ; Walloon in Belgium
Hugo Schuchardt an Reinhold Köhler (048-S.97-100)
Valonština v Belgii : Walloon in Belgium
Josef von Karabacek an Hugo Schuchardt (01-05270)