Esperanto Congress Haarlem
S.A.T. Esperanto Congress Amsterdam
Esperanto Domo Arnhem
I.K.U.E. Esperanto Congress The Hague
F.L.E. Esperanto Congress Heerlen
Esperanto - S.A.T. Congress Amersfoort
International Esperanto Congress Haarlem
Esperanto - S.A.T. Congress Rotterdam
