
Crick and Watson's DNA Molecular Model
1953
1953
1953
1948-1953
1945
1950-1952
1946-1950
1949
1949
1948-1950
1948-1953
1945
1948
1946
1943
1948
1947
1947
1948
1950
1953
1950
1951
1954
1949
1951
1953
1946
1954
circa 1953
1951
1944
1950-1953
1950-1953
1951
1955; 1830
circa 1950
1950
1951
1952
1954
1952
1954
1952
1954
1952
1954
1951
1951
1951-1953
1946-1948