
Crick and Watson's DNA Molecular Model
1953
1953
1953
1952-3
1951
circa 1956
1830 (original); 1967 (model)
1955
1955
1954
1953
1956
1956
1951-1953
1955
1953
circa 1956
1951
1956
1955
circa 1955
1953
1951
1955
1951
1955
1955
1955
1951
1954
1955
circa 1953
circa 1955
1956
1952
1954
1952
1954
1952
1954
1956
1956
1952
1951
1956
1953
1955
1955; 1830
1954-1955
1951
1955