
Crick and Watson's DNA Molecular Model
1953
1953
1953
1949
1935
1955
1951
1953
1942
1948-1953
1955
1957
circa 1956
1935-1945
1937
1945-1955
1943
1935
1935
1940
1951-1953
1953
1945
circa 1956
1940
1936
1940
1935
1948-1953
1948-1950
1952-3
1948
1946
1955
1955
1943
1948
1957
1957
1940-1950
circa 1955
1957
circa 1942
1958
1956
1952
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1957
1954
1952