1926
1918
1922-1923
1925
circa 1930
1927
1928
1920
1925-1928
1917
1920-1929
1920-1930
1955; 1830
1920-1928
2000-100 BCE
circa 1920
before 1928
1917-1918
1923
1925-1927
1927-1929
1921
1924
1934
1924-1927
1921-1926
1919
1921-1930
1920-1925
1918-1920
circa 1927