References
- Narcotics Control Digest. Washington Crime News Service, Annandale, Virginia August 28, 1974; 4, 35
- Scott L. J., Jr. Specific field test for cocaine. Microgram November, 1973; 6: 11, Scientific Services Division, Office of Research & Technology, Drug Enforcement Administration, U. S. Department of Justice, Washington, D. C.
- Winek C. L. Narcotics & Narcotic Addiction4th ed., D. W. Maurer, V. H. Vogel. Charles C Thomas, Springfield, Ill. 1974