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Photograph of Pr knob sliding out on short arm of chromosome number nine mentioned in letter from Charles Burnham on October 5, 1930.. NOTE: Originally enclosed in Series I, "Burnham, Charles ".
Original Repository:
The American Philosophical Society. Library. Barbara McClintock Papers
Location:
Box: 3. Folder: 5
Rights:
Courtesy of the Barbara McClintock Papers, American Philosophical Society.
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