1. Chromatography of alkaloids. Part A: Thinlayer chromatography. Chapter 2: Detection of alkaloids in TLC;Baerheim Svendsen,1983
2. Names of Medicinal Plants and Their Uses;Boonyaratanakornkit,1977
3. Observational (hippocratic) screening;Malone,1973
4. Pharmacological approaches to natural product screening and evaluation;Malone,1977
5. A Hippocratic screen for pure or crude drug materials;Malone;Lloydia,1962