
Crick and Watson's DNA Molecular Model
1953
1953
1953
1969-1970
1948-1953
1969
1920-1950
1940
1935-1965
1920-1960
1964-1970
1930-1960
1934
1915-1918
1955
1920-1925
1917
1918-1920
1919
1957
1942
1960
1936
circa 1956-1959
1920-1950
1920-1950
1935
1945-1955
1960-1969
1964
1947-1958
1955
1955
1918
1949
1955
1951-1953
(1962); 1982
1920
1920-1950
1936
1945
1945-1948
1960
1967
1920-1950
1920-1950
circa 1915
1830 (original); 1967 (model)
1951
1949