
Crick and Watson's DNA Molecular Model
1953
1953
1953
1920-1950
1969-1970
1969
1935
1988
1949
1976-1979
1976
1935-1965
1960
1955
1918
1903
1951
1960
1920-1950
1984-1986
1907
1930-1960
1901-1930
1920-1925
1919
1957
1953
1948-1953
1955
1942
1934
1920-1960
1918-1920
1899-1919
circa 1956
1937
1915-1925
1943
1945-1955
1925-1935
1909-1910
1935-1945
circa 1956-1959
circa 1980
1934-1935
1975
1920-1925
1964
1985
1985
1976-1982