Zamenhof, L. L. (15 August 1910). Parolado antaĆ la Sesa Kongreso Esperantista en Washington en la 15a de aĆgusto 1910 [Speech before the Sixth World Esperanto Congress in Washington on 15 August 1910] (Speech). Sesa Kongreso Esperantista (Sixth World Esperanto Congress) (in Esperanto). Washington, D.C. – via transcription done 12 August 1992 by Hirotaka, Masaaki from a paper copy and hosted on Steloj.de.