| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|
| Biology of Nitrogen Fixation | 978-0-7204-7135-9 (0-7204-7135-4) | 1974 | |
| Ecological Bulletins, Ecological Implications of Contemporary Agriculture: Proceedings of a Symposium held 7-12 September, 1986, at Wageningen | 978-87-16-10227-0 (87-16-10227-4) | 1991 | H. Eijsackers |