Bibliografía (11 obras)
American herbal pharmacopoeia
2010
American Herbal Pharmacopoeia
2008
Cramp Bark, Viburnum Opulus
2000
Black Haw Bark, Viburnum Prunifolium
Ashwagandha Root, Withania Somnifera
Men's Health
Astragalus Root, Astragalus Membranaceus
1999
Schisandra Berry Schisandra Chinensis
Willow Bark, Salix Spp
Echinacea
1997
St. John's wort
