|History| |Location| |Constituents| |Contra-Indications| |Formulas| |Experiences| |Bibliography|
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The Merck Index, Twelfth Edition. Merck & Co., Inc. Whitehouse Station, NJ. 1997.

Webb, Ginger. “Variability in Comfrey PA content.” HerbalGram No.38, winter 1998. Health World Online. www.healthy.net/library/journals/herbalgram/herbalgram38/resrev/comfrey.htm. 1998. Date accessed: 02/22/00.

Wren, R.C., F.L.S. “Potter's New Cyclopaedia of Botanical Drugs and Preparations.” The C.W. Daniel Company Limited. Saffron Walden, England. 1994. pp.87-88.

"Natural Healing with Herbs for a Healthier You"