| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|
| National Construction Estimator 1991 | 978-0-934041-58-4 (0-934041-58-X) | 1991 | Craftman |
| National Construction Estimator 1992 with Disk | 978-0-934041-68-3 (0-934041-68-7) | 1991 | " |
W. M. · Wall Michael · Will Michael · Willy Michel · Willy Michl