1. Drink-plants of the North American Indians;Harrard;Torrey Bot. Club Bull.,1895
2. Notes on medicinal and other uses of plants in Egypt;Osborn;Econ. Bot.,1968
3. The medicinal and poisonous plants of Southern and Eastern Africa;Watt,1962
4. New World Indians and their hallucinogenic plants;Schultes,1968
5. Beduin plant utilization in Sinai and Nejev;Dawin;Economuc Botany,1981