
Crick and Watson's DNA Molecular Model
1953
1953
1953
1955
1960
1960
1953
1955
1957
circa 1956
circa 1956-1959
1964
1963
1960
1960
1953
1959
circa 1956
1960
1968
1961
1962
1954-1968
1952-3
1960
1968
1955
1955
1957
1962
circa 1960
1957
1955-1965
1963
1965
circa 1955
1957
1962
1958
1956
1960
1964
1952
1968
1968
1963
1962
1963
1959
1959
1968