1. Unity of All Elementary-Particle Forces
2. Hierarchy of Interactions in Unified Gauge Theories
3. S. Glashow, Old and new directions, HUTP-79/A029; F. Wilczek and A. Zee, to be published.
4. J.J. Sakurai, UCLA/79/TEP/18; P. Langacker, J.E. Kim, M. Levine, H.H. Williams and D.P. Sidhu, Univ. of Pennsylvania preprint COO-3071-243, to be published in Neutrino-79.