| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|
| Managing Wetlands on Golf Courses | 978-0-471-47273-5 (0-471-47273-5) | 2004 | Gary Libby · Donald F. Harker |
| USGA Restoration Handbook on CD-ROM | 978-0-8493-2235-8 (0-8493-2235-9) | 1999 | Donald Harker · Gary Libby · Sherry Evans · Marc Evans |