1910=4,4; 1911=5,5; 1912=6,5; 1913=7,5; 1914=8,5; 1915=9,5; 1916=10,5; 1917=11,5; 1918=12,4; 1919=13,4; 1920=14,5; 1921=15,5; 1923=17,5; 1924=18,5; 1925=19,5; 1927=21,11; 1928=22,11; 1929=23,11; 1930=24,11; 1931=25,11; 1932=26,11; 1933=27,14; 1934=28,11; 1935=29,11; 1936=30,11; 1937=31,[11]; 1938=32,[11] von: American Library Association: Bulletin of the American Library Association (ISSN: 0364-4049)
1939=33,12; 1940=34,11; 1941=35,11; 1942=36,15; 1943=37,13; 1944=38,13; 1946=40,14; 1947=41,14 von: American Library Association: ALA bulletin (ISSN: 0364-4006)