| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|
| The birds of CITES and how to identify them | 978-O-7188-2894-3 (O-7188-2894-1) | 1993 | Johannes Erritzoe · illustrated by Helga Boullet Erritzoe · the author |
Foreword by H.R.H. The Prince of Wales