D. P. · R.D. · R. P. · Ron Porley
| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| Arable Bryophytes: A Field Guide to the Mosses, Liverworts, and Hornworts of Cultivated Land in Britain and Ireland | 978-1-903657-21-8 (1-903657-21-0) | 2008 |
| England's Rare Mosses and Liverworts: Their History, Ecology, and Conservation | 978-0-691-15871-6 (0-691-15871-1) | 2013 |