G L. · Thomas-G · Thomas L. · Thomas Lammers
Amer Society of Plant Taxonomists · Kew Publishing
| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| Systematics of Clermontia | 978-0-912861-32-6 (0-912861-32-0) | 1991 |
| World Checklist and Bibliography of Campanulaceae | 978-1-84246-186-0 (1-84246-186-9) | 2007 |