1909 Congress report Budapest

1910 Congress report Stockholm

1922 Congress report Prague Vol.1

1922 Congress report Prague Vol.2

Congress report Rome Vol.1

1924 Congress report Rome Vol.2

1924 Congress report Rome Vol.3

1925 Congress report Rome Vol.1-1

1925 Congress report Rome Vol.1-2

1925 Congress report Rome Vol.1-3

1925 Congress report Rome Vol.1-4

1925 Congress report Rome Vol.2-1

1925 Congress report Rome Vol.2-2

1925 Congress report Rome Vol.2-3

1925 Congress report Rome Vol.2-4

1926 Congress report Groningen Part-A

1926 Congress report Groningen Part-B

1929 Congress report Berlin

1929 Congress report Budapest Vol-A

1929 Congress report Budapest Vol-B

1932 Congress report Groningen Vol-A

1932 Congress report Groningen Vol-B

1932 Congress report Moscow

1933 Congress report Moscow

1933 Congress report Moscow Vol A

1933 Congress report Moscow Vol B

1933 Congress report Copenhagen Vol A

1933 Congress report Copenhagen Vol B

1934 Congress report Moscow Vol.1

1934 Congress report Moscow Vol.2

1934 Congress report Versailles

1935 Congress report Moscow

1935 Congress report Moscow

1937 Congress report Koenigsberg

1937 Congress report Vienna

1937 Congress report Zurich A

1937 Congress report Zurich B

1938 Congress report Bangor

1938 Congress report Helsinki 2A

1938 Congress report Helsinki 2B

1938 Congress report Helsinki 5A

1938 Congress report Helsinki 5B

1939 Congress report Brunswick A

1939 Congress report Brunswick B

1939 Congress report Stockholm 1

1939 Congress report Stockholm 2

1952 Congress report Dublin 1

1952 Congress report Dublin 2