G.B. · G. Beck · Gregor G. Beck · Gregor Gilpin Beck
| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) | |
|---|---|---|---|---|
| Atlas of the Breeding Birds of Ontario: 2001--2005 | 978-1-896059-15-0 (1-896059-15-5) | 2009 | Michael Cadman · Donald Sutherland | |
| Schwerpunkt Management, Controlling | 978-3-929221-45-9 (3-929221-45-4) | 1998 | ||
| Watersheds: A Practical Handbook for Healthy Water | 978-1-55209-330-6 (1-55209-330-1) | 1999 | Clive Dobson | |
Federation of Ontario Naturalists · Firefly Books · Ziel- Zentrum F. Interdis