ROTTERDAM-WERELDCONGRES-ESPERANTO CreatorRobert LantosDate of creation3 augustus 1967CollectionThe Netherlands National News Agency (ANP) – Photo archives, 1963-1968
ROTTERDAM-WERELDCONGRES-ESPERANTO CreatorRobert LantosDate of creation3 augustus 1967CollectionThe Netherlands National News Agency (ANP) – Photo archives, 1963-1968
ROTTERDAM-WERELDCONGRES-ESPERANTO CreatorRobert LantosDate of creation3 augustus 1967CollectionThe Netherlands National News Agency (ANP) – Photo archives, 1963-1968