By R. Ian Fryer (Rutgers, State University of New Jersey, Newark, NJ)
By Paola Grunanger (University di Pavia, Italy), Paola Vita-Finzi (University di Pavia, James E. Dowling (Princeton University, NJ)
By F. G. Kathawala (Sandoz Research Institute, East Hanover, NJ), Gary M. Coppola (Sandoz Research Institute, Herbert F. Schuster (Sandoz Research Institute