Paul H. Ephross is a professor at the University of Maryland School of Social Work. He is the coauthor of several works, including Group Work with Populations at Risk(with G. L. Greif) and Ethnicity and Social Work Practice(with C. B. Cox).Thomas V. Vassil is an associate professor at the University of Maryland School of Social Work. He is the coauthor of Groups in Social Work: An Ecological Perspective(with P. R. Balgopal).Alex Gitterman is a professor at the University of Connecticut School of Social Work and past president of the Association for the Advancement of Social Work with Groups. He is the editor of The Handbook of Social Work Practice with Vulnerable and Resilient Populations, winner of the Robert Wood Johnson Award for excellence; the coauthor (with Carel Germain) of The Life Model of Social Work Practice: Advances in Theory and Practice, 2d ed.; and the coeditor of Public Health Social Work in Maternal and Child Health: A Forward Plan.Lawrence Shulman is a professor at the School of Social Work at the State University of New York at Buffalo. He is the author or coeditor of seven books, including The Skills of Helping Individuals, Families, and Groups, 5th ed., Interactional Social Work Practice: Toward an Empirical Theory, and Teaching the Helping Skills: A Field Instructor's Guide, 3rd ed.