Improving the long-term effects of psychotherapy : models of durable outcome / edited by Paul Karoly and John J. Steffen. Karoly, Paul. Steffen, John J. Behavior therapy. Personality change. Behavior therapy. Psychotherapy. 616.891 KAI Includes bibliographies and indexes. New York : Gardner Press : Distributed by Halsted Press, c1980. c1980. 1980 Text xiii, 492 p. : eng