Jerome Rosenberg, Ph.D.is Professor Emeritus of Biological Sciences at the University of Pittsburgh. He is also the author of Schaumï¿½s Outline of Beginning Chemistry. Lawrence Epstein, Ph.D.is a retired Professor of General Chemistry at the University of Pittsburgh. He also co-authored Schaumï¿½s Outline of Beginning Chemistry. Peter Krieger, Ed.Dis a Professor of Natural Sciences at Palm Beach Community College where he also serves as Chairperson of the Chemistry/Physics department. He is the author of several instructorï¿½s manuals in chemistry as well as Understanding General Chemistry (Simon and Schuster) published in 1997.