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.
Unua Libro
…as the sole obligatory authority over Esperanto in the Declaration of Boulogne, ratified by the first World Esperanto Congress later that year. After many years of developing the language, Zamenhof completed Unua Libro by the spring of 1885 and spent the next two years looking for a publisher. In 1887, shortly after he married his wife…
1908 kl t zamenhof