| title | media type | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|---|
| Environment, Resources and Conservation | Hardcover | 978-0-521-30912-7 (0-521-30912-3) | 1991 | Susan Owens |
| Environment, Resources and Conservation | Paperback | 978-0-521-31378-0 (0-521-31378-3) | 1991 | " |