1957
1955
1954
1950-1953
circa 1950
1951
1950-1952
circa 1955
2000-100 BCE
1950-1951
circa 1953
1950
1953
1949
May 1953
1955; 1830
1954-1955
1956
1951-1953
1938 and 1951
1990-96