| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|
| A Field Guide to the Orchids of Britain and Europe | 978-0-00-219314-6 (0-00-219314-0) | 1978 | Andrew Williams |
| Field Guide to the Birds of East and Central Africa | 978-0-00-219180-7 (0-00-219180-6) | 1986 | |
| Field Guide to the Birds of East and Central Africa | 978-0-00-212021-0 (0-00-212021-6) | 1973 | |
G.W. · G. Williams · George W. · George Williams · J. G. · J. G. Williams · J. George · J. W. · J. Williams · John G. · John G. Williams · John George · John W. · John Williams