
Crick and Watson's DNA Molecular Model
1953
1953
1953
1955
1951
1953
1955
1957
circa 1956
1951-1953
1953
circa 1956
1952-3
circa 1955
1958
1956
1952
1954
1952
1957
1954
1952
1954
1957
1956
1957
1956
1957
1952
1957
circa 1955
1955; 1830
1956
1954
1958
1951
1956
1954
1951
1951
1956
1956
May 1953
1955
1951
1955
1958
1951-1953
1955
1955
1955