Robert M. Thorson · Robert T. · Robert Turcan · Roberto Triggiani
| title | ISBN-13 (ISBN-10) | year of publica- tion |
|---|---|---|
| Exploring Stone Walls: A Field Guide To Stone Walls | 978-0-8027-7708-9 (0-8027-7708-2) | 2005 |
| Stone by Stone: The Magnificent History in New England's Stone Walls | 978-0-8027-7687-7 (0-8027-7687-6) | 2004 |