TY - BOOK ED - Workshop on Grand Unification ED - Langacker, P ED - Steinhardt, P. J. ED - Weldon, H. A TI - Fourth Workshop on Grand Unification, University of Pennsylvania, Philadelphia, April 21-23, 1983 SN - 0817631690 PY - 1983/// CY - Boston, MA. PB - Birkhauser KW - Grand unified theories (Nuclear physics) KW - Congresses KW - Quantum gravity KW - Protons KW - Decay KW - Magnetic monopoles KW - Cosmology ER -