American Herb Association
Herbs and Aromatics
Naturopathic Herbalist
Henriette’s Herbal
American Botanical Council
The Herb Research Foundation
United Plant Savers
American Herbalists Guild
Medline Plus
Phytochemical and Ethnobotanical Databases
A Modern Herbal
Native American Ethnobotany Database
World Health Organization
Everything Herbal
Michael Moore
