Magnus Robb · R. M. · R. Magnus
| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|
| Petrels Night and Day | 978-90-810933-2-3 (90-810933-2-0) | 2008 | Mullarney Killian · The Sound Approach |
| Undiscovered Owls: A Sound Approach Guide | 978-90-810933-7-8 (90-810933-7-1) | 2015 | |