R.D. · Richard D. · Richard S., III Danbury
| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|
| The Inca Trail Cusco and Machu Picchu | 978-1-873756-86-7 (1-873756-86-0) | 2005 | Alexander Stewart |
| The Inca Trail: Cuzco and Machu Picchu | 978-1-873756-64-5 (1-873756-64-X) | 2003 | |
| The Inca Trail: Cuzco and Machu Picchu | 978-1-873756-29-4 (1-873756-29-1) | 1999 | |