| title | ISBN-13 | year of publica- tion | other author(s) |
|---|---|---|---|
| Clough Williams-Ellis | 978-1-85490-430-0 | 1996 | |
| Gwynedd | 978-0-300-14169-6 | 2009 | Julian Orbach · Adam Voelcker |
| O'Brien, Robert C., "Z. for Zachariah": Notes | 978-0-582-03824-0 | 1990 | |
| Powys | 978-0-300-18508-9 | 2014 | Robert Scourfield |
| Powys | 978-0-300-09631-6 | 1979 | |
John Wiley & Sons · Longman · Yale University Press