| title | media type | ISBN-13 | year of publication |
|---|---|---|---|
| Managing Biogas Plants: A Practical Guide | Hardcover | 978-1-138-62661-4 | 2017 |
| Managing Biogas Plants: A Practical Guide | Digital | 978-1-351-84807-7 | 2017 |
| Managing Biogas Plants: A Practical Guide | " | 978-1-351-84808-4 | 2017 |
| Managing Biogas Plants: A Practical Guide | " | 978-1-351-84809-1 | 2017 |
| Small Wind Turbines for Electricity and Irrigation: Design and Construction | Hardcover | 978-1-138-57022-1 | 2018 |