From the collections of the
International Esperanto Museum[?],
Montagu C. Butler library[?],
Centre de documentation et étude sur la langue internationale[?], and the
German Esperanto Library[?], the
Hector Hodler Library is one of the largest
Esperanto libraries, with approximately 20,000 books, with periodicals, manuscripts, photos, music, and other collections. It occupies three rooms in the central office of the
Universal Esperanto Association in
Rotterdam,
Netherlands.
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