California Inst of Public · University of Illinois Press
| 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 | 978-1-880028-00-1 (1-880028-00-X)  | 1994 | Julie Denny-Hughes | 
| The Indiana Dunes Revealed: The Art of Frank V. Dudley | 978-0-252-03139-7 (0-252-03139-3)  | 2006 | James R. Dabbert · Joan Gibb Engel · Wendy Greenhouse · William H. Gerdts | 
| The INDIANA DUNES REVEALED: The Art of Frank V. Dudley | 978-0-252-07378-6 (0-252-07378-9)  | 2006 | James R. Dabbert · Joan Gibb Engel · Wendy Greenhouse · William H. Gerdts | 
J. E. · J. Engel · J R · R. E. · R. Engel · Ronald E.