
Crick and Watson's DNA Molecular Model
1953
1953
1953
1969-1970
1948-1953
1969
1920-1950
1940
1907
1935-1965
1920-1960
1964-1970
1903
1930-1960
1934
1915-1918
1955
1918-1920
1919
1957
1920-1925
1917
1960
1901-1930
1936
circa 1956-1959
1920-1950
1945-1955
1935
1960-1969
1974
1964
1947-1958
1955
1918
1903
1955
1936
1901-1930
1945
1949
1965
1945-1948
1900-1920
1960
1775-1799 (original); 1900-1907 (model)
1967
1920-1950
1949
1905
1951