You can look at some of these different books as well as the abstracts in the Protocols section of LEF, for referances.
Scientific Validation of Herbal Remedies.
Mowrey D.
USA: Keats Publishing, 1990.
Herbal Tonic Therapies.
Mowrey D.
USA: Keats Publishing, 1993.
Herbal Medicine.
Weiss...