Penguin book
1948
1948
1946
1948
1947
1946
1946
1946
1948
1946
2000-100 BCE
1938 and 1951
1947
1948
1955; 1830
1948
1946-1948
1948
1990-96
1946-1948
1948
1947-1948
circa 1947
1801-1892 (prepared); 1946 (element replaced)
1947
1903 (original); 1982 (model)
4000-2001 BCE
1947
1948
1947
1830 (original); 1967 (model)
1948
1946
1989-08
1946
1946
1948
1948
1946
1730; 1967
1947
1946
pre-1948
1946
1946
1972-3
1947
2500 BCE
1946
1950-1920
1946