R. L · R. Lawson · Robert L. · Robert Lawson · Robert W. · W. Lawson
| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|
| Birding by Ear: Eastern and Central North America | 978-0-618-22590-3 (0-618-22590-0) | 2002 | Richard K. Walton |
| Birding by Ear: Western North America | 978-0-395-97525-1 (0-395-97525-5) | 1999 | " |
| More Birding by Ear Eastern and Central North America: A Guide to Bird-song Identification | 978-0-618-22592-7 (0-618-22592-7) | 2000 | " |