J.S. · John C. Sill · John S.
| title | ISBN-13 | year of publica- tion | other author(s) |
|---|---|---|---|
| About Mammals: A Guide For Children | 978-1-56145-174-6 | 2000 | Cathryn Sill |
| A Field Guide to Little-Known and Seldom-Seen Birds of North America | 978-0-934601-58-0 | 1988 | Ben Sill · Cathryn Sill |
| Another Field Guide to Little Known and Seldom Seen Birds of North America | 978-0-934601-97-9 | 1990 | Ben Sill · Cathryn Sill |
| Beyond Birdwatching: More Than There Is to Know About Birding | 978-1-56145-084-8 | 1993 | Ben Sill · Cathryn Sill |