Penguin book
1948
1948
1946
1948
1947
1946
1946
1946
1948
1946
1949
2000-100 BCE
1938 and 1951
1947
1948
1955; 1830
1949
1946-1948
1948
1949
1948
1990-96
1949
1948
1947-1948
1949
circa 1947
1947
1903 (original); 1982 (model)
1949
4000-2001 BCE
1947
1948
1947
1946-1948
1801-1892 (prepared); 1946 (element replaced)
1830 (original); 1967 (model)
1948
1946
1989-08
1948
1949
1948
1946
1730; 1967
1949
1947
1946
pre-1948
1946
1946