U. S. Treasury Department, Bureau of Narcotics. Marihuana: its Identification. Washington, DC: Government Printing Office, 1938. First edition. Twelvemo. 41pp. Illustrated with 31 b/w photo plates. Publisher’s grey card wraps, staplebound. Scarce. A fascinating guide, published by the Bureau of Narcotics, for the use of law enforcement. From The.....