• France
    8 February 1950
    (Paris)
  • Netherlands
    10 August 1950
  • Sweden
    26 December 1950
  • West Germany
    26 January 1951
  • Portugal
    14 April 1951
  • Austria
    1952
  • Spain
    11 August 1952
    (Madrid)
  • Denmark
    12 December 1955