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Hugo Schuchardt an Matthias de Vries (04-3)
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Matthias de Vries an Hugo Schuchardt (07-12555)
Matthias de Vries an Hugo Schuchardt (16-12561)
Rodolfo Lenz an Hugo Schuchardt (04-06398)
Hugo Schuchardt an Vatroslav Ignaz Jagič (23-s-n)
Emil Metzger an Hugo Schuchardt (01-07122)
Emil Metzger an Hugo Schuchardt (02-07123)
Emil Metzger an Hugo Schuchardt (03-07124)
Emil Metzger an Hugo Schuchardt (04-07125)
Emil Metzger an Hugo Schuchardt (07-07128)