The president's report.

v.16 no.2 1911-1912; v.17 no.1 1912-1913; v.18 no.1a 1913-1914; v.19 no.1 1914-1915; 1911/12,1913/14-1915/16; v.20 no.52 1915-1916; v.21 no.37 1916-1917; v.22 no.9 1917-1918; v.22 no.52 1918-1919; 1916/17-1919/20; v.23 no.47 1919-1920; 1920-1921; v.26 no.50 1922-1923; 1923-1924; v.28 no.52 1924-1925; v.29 no.53 1925-1926; v.30 no.88 1926-1927; v.31 no.56 1927-1928; v.33 no.50 1928-1930; v.35 no.64 1930-1932; v.37 no.50 1932-1934; v.39 no.61 1934-1936; v.41 no.67 1936-1938; v.43 no.70 1938-1940; v.45 no.73 1940-1942; v.47 no.57 1942-1944; v.49 no.52 1944-1946; v.53 no.60 1948-1950; 1952-1954; 1954-1956; 1958-1960; 1963/1964; 1970-1972