Cambridge University Press
1902-
1902 : 1st ed , 1905 : 4th ed , 1912 : 11th ed , 1914-1915 : 13th ed , 1917 : 16th ed , 1921-1922 : 20th ed , 1922-1923 : 21th ed , 1923 : 22nd ed , 1924 : 23rd ed , 1925 : 24th ed , 1926 : 25th ed , 1928 : 27th ed , 1931 : 30th ed , 1932 : 31st ed , 1933 : 33d ed , 1935-1936 : 34th ed , 1937-1938 : 36th ed , 1951-1952 , 1953-1954 , 1957 , 1957-1958 : 47th ed , 1959-1960 : 49th ed , 1961-1962 , 1963 : 53rd ed , 1964 : 54th ed , 1966 : 56th ed , Supplement for 1948-49
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