| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|
| Flora of the Venezuelan Guayana | 978-0-915279-46-3 (0-915279-46-0) | 1997 | Julian Steyermark · Paul Berry · Kay Yatskievych |
| Flora of the Venezuelan Guayana, Volume 2: Pteridophytes, Spermatophytes, Acanthaceae-Araceae | 978-0-915279-74-6 (0-915279-74-6) | 1995 | Julian Steyermark · Paul Berry · Kay Yatskievych |
Börge Hellström · Börge HELLSTROM · Borge Hellstrom · Brooke Hollister · Bruce H. · Bruce Halstead · Bruce K. Holst