| title | ISBN-13 (ISBN-10) | year of publica- tion |
|---|---|---|
| Evaluation of Herbal Medicinal Products | 978-0-85369-751-0 (0-85369-751-5) | 2009 |
David P. Houghton · David Patrick Houghton · Eliza P. Donner Houghton · Pat Houghton · Peggy M. Houghton · Peggy M. Houghton Ph.D. · Pete Houghton · Peter Houghton · Peter J. Houghton