
Crick and Watson's DNA Molecular Model
1953
1953
1953
1948-1953
1920-1950
1940
1934
1920-1925
1918-1920
1919
1942
1936
1920-1950
1920-1950
1935
1918
1949
1951-1953
1920
1920-1950
1936
1945
1945-1948
1920-1950
1920-1950
1830 (original); 1967 (model)
1951
1949
1949
1951
1925-1935
1925-1926
1950
1948-1953
1950
1952-3
1948-1950
1947
1935
1930
circa 1930
circa 1942
1923-1939
1945
1920-1950
1920-1950
1931
1947
1924
circa 1930
1935