| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|
| National Geographic Driving Guide to America, The Heartland | 978-0-7922-7423-0 (0-7922-7423-7) | 1999 | Michael Forsberg · Michael Lewis |
| The Heartland: Missouri, Kansas, Nebraska, Iowa, South Dakota, and North Dakota | 978-0-7922-3434-0 (0-7922-3434-0) | 1997 | Michael Lewis · Michael Forsberg · National Geographic Society (U. S.) |