Unua Libro
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Dr. Esperanto's International Language, commonly referred to as Unua Libro, is an 1887 book by L. L. Zamenhof, in which he first introduced and described the constructed language Esperanto. First publ
Dr. Esperanto's International Language (1889 Geoghegan translation)
The original Russian publication of Unua Libro and the 1887 Polish, French, and German translations
Proto-Esperanto
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Proto-Esperanto is the modern term for any of the stages in the evolution of L. L. Zamenhof's language project, prior to the publication of Unua Libro in 1887.
1908 kl t zamenhof
