Eugene Wigner , “On the mass defect of helium”, Physical Review 43 No. 4 pp. 252-257, 15 February 1933. AND WITH:  by Milton G. White and Ernest O. Lawrence , “Disintegration of Boron by Swiftly Moving Protons” in the same issue, pp. 304-305. Original wrappers.  Beautifully and expertly rebacked (quite seamless) with a plain paper perfectly matching the wrapper color. Wrapper edges are slightly sunned.  $195

• “Eugene Wigner discovered that the force binding nucleons together is weak when the distance between them is great but strong when they are close together in the atomic nucleus. White and Lawrence confirm the first nuclear reaction (carried out by Cockcroft and Walton earlier in the year) with another element, Boron.”--David Wenner, author of A History of Physics, the Wenner Collection.     

See also: Wigner, “The Neutron: The Impact of Its Discovery and Its Uses”, part of  Wigner Collected Works,  volume B / 7.