Academic Press · HarperCollins · St. Martin's Press
| title | ISBN-13 | year of publica- tion | other author(s) |
|---|---|---|---|
| A Conscious Stillness: Two Naturalists on Thoreau's Rivers | 978-0-06-015002-0 | 1982 | Ann Zwinger |
| NORTH WITH THE SPRING | 978-0-12-583171-0 | 1963 | |
| North With the Spring: A Naturalist's Record of a 17,000-Mile Journey With the North American Spring | 978-0-312-04457-2 | 1990 | |
| Wandering Through Winter: A Naturalist's Record of a 20,000-Mile Journey Through the North American Winter | 978-0-312-04458-9 | 1990 | |