High energy nuclear physics : proceedings of the Sixth Annual Rochester Conference, April 3-7, 1956 - Rochester Conference on High Energy Nuclear Physics; Ballam, J.; National Science Foundation (U.S.); University of Rochester; Institute for Advanced Study (Princeton, N.J.); Princeton University; Brookhaven National Laboratory; U.S. Atomic Energy Commission; Air Research Development Command (Distributed by Interscience, 1956)