| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|
| The Indiana Dunes Revealed: The Art of Frank V. Dudley | 978-0-252-03139-7 (0-252-03139-3) | 2006 | J. Ronald Engel · 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 | J. Ronald Engel · Joan Gibb Engel · Wendy Greenhouse · William H. Gerdts |