An improved procedure for the field testing of cannabis.
D002188:Cannabis / Q000032:analysis*; D002623:Chemistry Techniques, Analytical; D004396:Coloring Agents; D004335:Drug and Narcotic Control; D006801:Humans; D008722:Methods; D010209:Paper; D019966:Substance-Related Disorders; D006113:United Kingdom
D004396:Coloring Agents