Herman Cember

Herman Cember, PhD, PE is the author of the earlier editions of "Introduction to Health Physics". He is a Professor Emeritus in industrial hygiene and radiation health in the Environmental Health Engineering Department at Northwestern University. Dr. Cember is also a Visiting Professor of Health Physics in the School of Health Sciences at Purdue University. Thomas E. Johnson, PhD is an assistant professor in the Department of Radiological Health Sciences at Colorado State University.