Penguin book
1948
1948
1946
1943
1948
1945
1947
1950
1951
1950
1950-1951
1951
1945
circa 1950
1942
1944-1945
circa 1950
1946
1946
1951
1946
1948
1946
1951
1949
1944
1942
2000-100 BCE
1943
1938 and 1951
1947
1948
1942
1955; 1830
1945
1949
1950
1951
1946-1948
1941-1950
1951
1950
1948
1949
1945-1948
circa 1950
circa 1950
1943
1951
1948
1950