H B ยท H. Bergmann
| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| Guide to the Economic Evaluation of Irrigation Projects | 978-92-64-11021-2 (92-64-11021-6) | 1976 |
| Guide to the economic evaluation of irrigation projects | 978-92-64-11483-8 (92-64-11483-1) | 1976 |