20ème Congrès international de la jeunesse espérantiste, 1964, Amsterdam
By: Tutmonda Esperantista Junulara Organizo.
Contributors: Tutmonda Esperantista Junulara Organizo.
Publisher: Stichting 20ste Internationaal Jeugdcongres
Published: 1964
Place of publication: Amsterdam
Language: fre
Number of pages: 36
Subjects: Esperanto -- Congresses.
Other titles: Vingtième Congrès international de la jeunesse espérantiste
Notes: Cover title.