Proceedings.

1910; 1910:1-2; 1st cong., v.1 1910; 1st:v.1 (1910); 1st:v.2 (1910); 1st cong., v.2 1910; 1912; 1912:1-2; 2nd cong., v.1 1912; 2nd cong., v.2 1912; 2nd:v.1; 2nd:v.2 (1913); 1925:1-2; 3rd (1925); 1928:1-2; 4th cong., v.1 1928; 4th cong., v.2 1928; v.4th (1928); 4th:v.1 (1928); 4th:v.2 (1928); 1932:2; 5th:v.1 (1932); 5th:v.2 (1932); 6th:v.1 (1935); 6th:v.2 (1935); 1938:1; 1938:5; 7th:prog. (1938); v.7th (1938) v.2; v.7 preliminary program:1938; 7th:v.1 (1939); 7th:v.2 (1939); 7th:v.3 (1939); 7th:v.4 (1939); 7th:v.5 (1939); 1948; v.8th (1948); 8th:v.1 (1950); 1951:1-2; 9th:v.2 (1951); 9th:v.1 (1952/53); 1956:4; 1956:3; 1956:2; 1956:1; v.10th (1956) v.2; v.10th (1956) v.3; 10th:v.1 (1956); 10th:v.2 (1956); 10th:v.3 (1956); 10th:v.4 (1956); 1960:3; 1960:2; 1960:1 -11th; 11th:bd.1 (1960); 11th:bd.2 (1960); 11th:bd.3 (1960); 12 1964; 12th: v.1 (1964); 13:3 1968; 13:2 1968; 13:1 1968; 13th:t.1 (1968); 13th:t.2 (1968); 13th:v.3 (1968); 14:1 1972; 14:2 1972; v.14 programme(1972); 15 1976; 15th (1976); 16 1980; 16th (1980); 17:2 1984; 17:1 1984; 18 1988; 18th (1988); 19th* (1992); 20th 1996*; v.10(1956:1); v.10(1956:4); v.11(1960:3); v.11(1960:2); v.11(1960:1); v.1(1910:1); v.12(1964); v.13(1968:3); v.13(1968:1); v.13(1968:2); v.2(1912:2); v.3(1925); v.5(1932:1-2); v.7(1938:3); v.7(1938:5); v.7(1938:4); v.7(1938:1); v.9(1951:1); 1(1912); 1(1910:1); 3(1925); 5(1932:1-2); 8(1948); 13(1968:1); 11(1960:1); 9(1951:1); 10(1956:1); 7(1938:1); 1(1910:2)