| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|
| Agricultural Extension and Research: Achievements and Problems in National Systems | 978-O-8213-3878-O (O-8213-3878-1) | 1997 | Jock R. Anderson |
D. L. Purcell · D. P. · Dennis Purcell · L.P. · L. Purcell