Plant Based Remedies in 1991

An Herbal Guide to Stress Relief: Gentle Remedies and Techniques for Healing and Calming the Nervous System by Hoffmann, David

Indian Herbalogy of North America: The Definitive Guide to Native Medicinal Plants and Their Uses by Hutchens, Alma R.

The Medicinal Plant Industry by Wijesekera, O. B., Wijesekera, Wijesekera O. B., Corbel, Michael J.