
Crick and Watson's DNA Molecular Model
1953
1953
1953
1952-3
1951
circa 1956
1830 (original); 1967 (model)
1955
1957
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1954
1953
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1956
1951-1953
1955
1953
1958
circa 1956
1951
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circa 1955
1953
1951
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1951
1955
1955
1955
1957
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1951
1954
1955
1957
circa 1953
circa 1955
1957
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1956
1952
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1952
1957
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1957
1956