1. The Elements of Deformation Analysis Hiddo Velsink [Browse] Delft Hogeschool Utrecht 2018 Book Online HBO Kennisbank Bookmark
2. Unua lernolibro de Esperanto por Japanoj 日本エスペラント協会金沢支部 Book Online National Diet Library Digital Collections: Internet Access (国立国会図書館デジタルコレクション 図書 インターネット公開) Bookmark
3. Dictionnaire esperanto français avec résumé de la grammaire / par la Lumo. Lumo (Kanada Esperanto-Associo) [Browse] Montréal : S.E.A., 1903. Book Online Canadiana Online - Monographs Bookmark
4. Las lenguas del mundo / Jesús Tuson. Tuson, Jesús [Browse] Barcelona : Editorial UOC, 2016. Book Online Digitalia Hispanica Bookmark
5. Esperanto – Lingua Franca and Language Community Fiedler, Sabine [Browse] John Benjamins Publishing Company 2022 Book Online Walter De Gruyter: Open Access eBooks Bookmark
6. The Oxford linguist. [Oxford?] : [publisher not identified], 2024- Journal Online Free E- Journals Bookmark
7. Aktiva porpaca laboradi. Middlesex, Anglujo : Internacio de Militrezistantoj, [between 1950 and 1959?] Book Online Power to the People! Counterculture, Social Movements, & Alternative Press, 1960-2015 Bookmark
8. Espero pacifista : monata organo de "Pacifisto" (Internacia societo esperantista por la paco). Paris : Presa Esperantista Societo, 1907. Book Online Power to the People! Counterculture, Social Movements, & Alternative Press, 1960-2015 Bookmark
9. Contemporary studies / by Charles Baudouin ; translated from the French by Eden and Cedar Paul. Baudouin, Charles, 1893-1963 [Browse] London : George Allen and Unwin Limited, 1924. Book Online Power to the People! Counterculture, Social Movements, & Alternative Press, 1960-2015 Bookmark
10. Historia kaj filozofia fono de la moderna pacifismo / Harold Bing ; tradukita el la angla lingvo de Guy Tordoff kaj Reto Rossetti. Bing, Harold F. [Browse] London : War Resisters' International, [1971?] Book Online Power to the People! Counterculture, Social Movements, & Alternative Press, 1960-2015 Bookmark