
Crick and Watson's DNA Molecular Model
1953
1953
1953
1949
1955
1951
1957
1953
1942
1948-1953
1955
circa 1956
1943
1945-1955
circa 1956-1959
1951-1953
1953
1959
1945
1940
circa 1956
1940
1940
1948-1953
1948-1950
1952-3
1948
1946
1950-1959
1955
1950-1959
1955
1943
1948
1957
1957
1940-1950
circa 1955
1957
circa 1942
1958
1956
1952
1959
1959
1954
1952
1957
1954
1952
1954