[Washington, D.C.]: Bureau of Narcotics & Dangerous Drugs, . Octavo. 47pp. Saddle-stapled in printed green wraps. A very good (+) copy with light wear at tips and along spine hinge, a few minor spots of soiling. “This book was conceived as a document which would present the Bureau of Narcotics and Dangerous Drugs’ view of the problem, based on what we know—and do not know—about the harmful effects of cannabis abuse.” Illustrated throughout with black-and-white photographs.