Penguin book
1948
1948
1955
1955
1948
1956
1950-1953
1947
1947
1955
1955
circa 1953
1953
1956
1955
1955
1950
1953
1951
1951
1955; 1830
1950
1956
1948
1950-1951
circa 1955
1948-1953
1951
1955
1951
1955
1949
1950-1953
1954-1955
1950-1952
1954
1955
1949
1953
1953
1951
2000-100 BCE
circa 1950
1951-1953
1938 and 1951
1951-1953
May 1953
1950
1951
1948
circa 1955