
Crick and Watson's DNA Molecular Model
1953
1953
1953
1969-1970
1969
1949
1935
1976
1955
1960
1935-1965
1951
1960
1934
1953
1942
1948-1953
1955
1957
circa 1956
1935-1945
1937
1945-1955
1943
circa 1956-1959
1934-1935
1975
1964
1935
1963
1935
1973
1940
1969
1960
1960
1951-1953
1953
1959
1945
circa 1956
1937-1960
1960
1940
1968
1936
1940
1961
1934
1974
1935