izdatelsvo Komsomol, Moscow 1966. 8vo. 620 pages. Illustrated in b/w. Publishers pictorial boards with cloth spine. With an inscription inserted on the front fly leaf. With light signs of wear and tear at the covers, overall in very good+ condition. * The inscription says: "To Prof. Aage Bohr - a book of which his father is the second hero - with the author's profound repsects - Daniel Danin".