A field guide to medicinal plants and herbs of eastern and central North America /
Medicinal plants and herbs
Steven Foster and James A. Duke.
- 2nd ed.
- Boston : Houghton Mifflin Co., 2000
- xiii, 411 p. : ill. col. ; 20 cm.
- Peterson field guide series .
'Sponsored by te National Audubon Society, the National Wildlife Federation, and the Roger Tory Peterson Institute.' Rev. ed. of: Field guide to medicinal plants. 1990.