Bohr (Niels) Open Letter to the United Nations, signed and inscribed on the cover: 'Douglas Glass / with kind regards / Niels Bohr / 21-3-1960', 14 pp, original printed wraps, dampstaining to upper and lower margins of first two and last two leaves, mild spotting to cover, toning and thumbing overall, 8vo, Copenhagen: J.H. Schultz Forlag, 1950. *** Presentation copy of the offprint of Bohr's famous address to the UN regarding nuclear proliferation.