| title | media type | ISBN-13 | year of publication |
|---|---|---|---|
| Man and his environment: citizen action | 978-0-06-041993-6 | 1975 | |
| Man and his environment: citizen action | Paperback | 978-0-06-041994-3 | 1975 |
| Opportunities in Environmental Careers, Revised Edition | " | 978-0-07-138722-4 | 2002 |
| Opportunities in Environmental Careers, Revised Edition | Hardcover | 978-0-07-138723-1 | 2002 |