HarperCollins · The Crowood Press Ltd
| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|
| Birds of Britain & Europe | 978-0-00-219995-7 (0-00-219995-5) | 1994 | Jurgen Nicolai · Singer · K Wothe |
| Field Guide to Birds of Britain and Northern Europe | 978-1-85223-596-3 (1-85223-596-9) | 1991 | |
Brian D. Singer · D.S. · Dana Singer · Daniel D. Singer · Daniel Singer · David Andrew Singer · David Singer · Deborah Singer Dobson · Debra Singer · Detlef Singer · Don B. Singer · Dorothy G. Singer · Dorothy Singer · Dr. Jack Singer · J. D. Singer · J. David Singer · Jon Douglas Singer · Judith D. Singer · Ph.d., Raymond Singer · Professor Dorothy G. Singer · Randy D. Singer · Steven D. Singer