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