DAVID E. Smith, M.D., is Medical Director of the Haight-Ashbury Medical Clinic, Consultant on Drug Abuse at the San Francisco General Hospital, Assistant Clinical Professor of Toxicology at the San Francisco Medical Center of the University of California, and Lecturer in Criminology at the University of California, Berkeley. He also edits the Journal of Psychedelic Drugs.

JAMES T. CAREY, Ph.D., is Assistant Professor of Criminology at the University of California, Berkeley.

GILBERT GEIS, Ph.D., is Professor of Sociology at Long Beach State College.

ERICH GOODE, Ph.D., is Assistant Professor of Sociology at the State University of New York, Stoney Brook.

WILLIAM H. MCGLOTHLIN, Ph.D., is Research Psychologist at the University of California, Los Angeles.

CARTER MEHL, M.S., is Research Associate at the Haight-Ashbury Medical Clinic.

MARK MESSER, Ph.D., is Associate Professor of Sociology at the University of California, Santa Cruz.

FREDERICK H. MEYERS, M.D., is Professor of Pharmacology at the University of California Medical Center.

M. NELSEN is a graduate student in the Department of Pharmacology at the Boston University School of Medicine.

FRED E. SHICK, M.D., is Resident in Psychiatry at the University of Chicago, and Research Associate at the Haight-Ashbury Medical Clinic.

ROGER C. SMITH, M.S., is Director of the Amphetamine Research Project at the University of California Medical Center.

MICHAEL A. TOWN, LL.M., is a member of the California Bar; A.B., Stanford University; J.D., University of California (Hastings College of the Law); LL.M., Yale Law School.

ANDREW T. WEIL, M.D. is a physician with the National Institute of Mental Health.

NORMAN E. ZINBERG, M.D., is a psychoanalyst, currently doing research in the Department of Psychiatry at the Tufts University School of Medicine.