| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|
| Advancing Ethics for Living Sustainably: Report of the Iucn Ethics Workshop, April 1993, Indiana Dunes National Lakeshore, U.S.A | 978-1-88OO28-OO-1 (1-88OO28-OO-X) | 1994 | J. Ronald Engel |
D,. H.. · D. Hughes · J.D. · J. D. Hughes · J. Denny · J. H. · J. Hughes · Julie Hughes