41. Étude sur la dérivation en esperanto, dédiée à MM. les membres du comité de ls Délégation pour l'adoption d'une langue auxiliarie internationale, par Louis Couturat ... Couturat, Louis, 1868-1914 [Browse] Coulommiers, Impr. P. Brodard, 1907. Book ReCAP - Remote Storage » 1231.32.130
42. Esperanto, een taal om van te houden / door Wim Jansen. Jansen, Wim [Browse] Amsterdam : Vossiuspers UvA/Amsterdam University Press, 2009. Book OnlineEbook Central Perpetual, DDA and Subscription Titles
43. The International Auxiliary Language Esperanto: Grammar & Commentary Cox, George 1838-1909 [Browse] Project Gutenberg Book OnlineProject Gutenberg Online Catalog
44. Esperanto: Hearings before the Committee on Education Christen, A. [Browse] Project Gutenberg Book OnlineEBSCOhost Literary Reference Center
45. A primer of Esperanto, the auxiliary language; a second language for all nations. O'Connor, J. C. (John Charles), 1853-1928 [Browse] London, British Esperanto association, inc., 1907. Book ReCAP - Remote Storage » 1231.31.2.20
46. Esperanto and languages of internationalism in revolutionary Russia / Brigid O'Keeffe. O'Keeffe, Brigid, 1979- [Browse] London ; New York : Bloomsbury Academic, 2021.©2021 Book Loading...Firestone Library - Stacks » PM8209 .O34 2021
47. Establishment of Esperanto department in Dresden police station. [United Kingdom] : Foreign Office, 1921-11-26 Book OnlineHistory Commons: Weimar and Nazi Germany
48. Karlo Facila Legolibro por la Lernado de Esperanto Privat, Edmond 1889-1962 [Browse] Project Gutenberg Book OnlineProject Gutenberg Online Catalog
49. Curso Completo (Elementar, Médio e Superior) de Esperanto [Verlag nicht ermittelbar] Journal OnlineEZB Free E-Journals
50. A practical grammar of the international language (esperanto) / by Ivy Kellerman Reed. Reed, Ivy Kellerman, Mrs., 1877- [Browse] Washington, D.C. : The American School of Esperanto, 1915. Book ReCAP - Remote Storage » KC 17526