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- Pharmacognosy Reviews
- http://www.phcogrev.com/
- Medknow Publications
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- Medicinal Plants of the World
- Ben-Erik van Wyk
- Michael Wink
- 2010
- Timber Press
- 4th
- 480
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- NCCAM Herbs at a Glance
- National Center for Complementary and Integrative Health
- https://nccih.nih.gov/health/herbsataglance.htm