| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|
| Ilwis: the Integrated Land and Watershed Management Information System: Scientific Status Report on the Project: Geo Information System for Land Use Zoning and Watershed Management | 978-9O-6164-O55-4 (9O-6164-O55-5) | 1988 | Carlos R. Valenzuela · Ann Stewart |