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Authors whose works are in public domain in at least one jurisdiction

List of works by Franz Unger

Botanical letters to a friend ⬇️

London: Samuel Highley, 1853.

Botanische Briefe ⬇️

Wien,C. Gerold & sohn,1852. | New York Botanical Garden, LuEsther T. Mertz Library

Insel Cypern ihrer physischen und organischen Natur ⬇️

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