| year of publication | ISBN | author(s) | title |
|---|---|---|---|
| 1992 | 978-1-874275-00-8 | Martin Crawford | Directory of Useful Plants for Temperate Climates: Trees v. 1 |
| '' | 978-1-874275-01-5 | Martin Crawford | Directory of Useful Plants for Temperate Climates: Trees - Alphabetical v. 1A |
| 2001 | 978-1-874275-40-4 | '' | Directory of Apple Cultivars |