
Crick and Watson's DNA Molecular Model
1953
1953
1953
1920-1950
1949
1935
1918
1951
1920-1950
1934
1920-1925
1918-1920
1919
1953
1942
1948-1953
1935-1945
1937
1915-1925
1943
1925-1935
1934-1935
1920-1925
1935
1915-1918
circa 1910
1935
1951-1953
1953
1945
1920-1950
1921-1930
1940
1920-1940
1917
1910-1926
1940
1936
1940
1913
1934
1926-1932
1935
1920-1950
1920-1950
circa 1919
1920-1950
c.1912
circa 1915
1948-1953
1948-1950