- Marcel Boulenger
- José Nebot Pérez
- Willem Sijbrand Logeman
- Yazar Bilinmiyor
- Thomas D. Seymour
- Yazar Bilinmiyor
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De waarheid over Esperanto en Ido = La vérité sur l'Esperanto et l'Ido
Antoon Jozef WitteryckAntoon Jozef Witteryck - Thomas Raynesford Lounsbury
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- L. L. Zamenhof
- Xiong Yang
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Chips from a German Workshop, Volume 4 Essays Chiefly on the Science of Language
F. Max Müller - Giuseppe Peano
- J. M. D. Meiklejohn
- F. Max Müller
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The Arawack Language of Guiana in its Linguistic and Ethnological Relations
Daniel G. Brinton - Walter W. Skeat
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International Language, Past, Present & Future With Specimens of Esperanto and Grammar
Walter John Clark - Sir James Augustus Henry Murray