Danish physicist (1885-1962) who was awarded the 1922 Nobel Prize in Physics for his theory of atomic structure. Bold and crisp fountain pen signature, "Niels Bohr, Kopenhagen, 1-7-60,” on a white 5.75 x 3.5 card. Also includes an ink signature of his son (and fellow Nobel Prize-winning physicist), "Aage Bohr," on a white 5.75 x 3 card. In very fine condition. Accompanied by both original mailing envelopes.
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