| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| Evaluation of Herbal Medicinal Products | 978-O-85369-751-O (O-85369-751-5) | 2009 |
David P. Houghton · David Patrick Houghton · Eliza P. Donner Houghton · P. H. · P.S. Houghton · Pat Houghton · Patricia Houghton · Peggy M. Houghton · Peggy M. Houghton Ph.D. · Pete Houghton · Peter Houghton · Peter J. Houghton · Peter J. Houghton Et.Al · Philip Houghton · Prof Peter Houghton