Published the book Lehrbuch der internationalen Hilfssprache Esperanto (Textbook of the International Auxiliary Language Esperanto)
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← Alfred Hermann Fried timeline
Published the book Lehrbuch der internationalen Hilfssprache Esperanto (Textbook of the International Auxiliary Language Esperanto)
Text from Wikipedia, available under CC BY-SA 4.0.
Captured 2026-08-17 from Wikipedia. The archived copy is preserved so this citation survives link rot.