Observation of High-Energy Neutrino Reactions and the Existence of Two Kinds of Neutrinos Danby, G. ; Gaillard, J. -M. ; Goulianos, K. ; Lederman, L. M. ; Mistry, N. ; Schwartz, M. ; Steinberger, J. Abstract Publication: Physical Review Letters Pub Date: July 1962 DOI: 10.1103/PhysRevLett.9.36 Bibcode: 1962PhRvL...9...36D