K. Buttler · K. Peter · Karl P. Buttler · Karl Peter
Mosaik · The Crowood Press Ltd
| title | ISBN-13 (ISBN-10) | year of publica- tion | |
|---|---|---|---|
| Field Guide to Orchids of Britain and Europe | 978-1-85223-591-8 (1-85223-591-8) | 1991 | |
| Steinbachs Naturführer Orchideen | 978-3-576-04403-6 (3-576-04403-5) | 1994 |