- Author: George W. Douglas
- Language: English
- Year: 2002
- Author: George W. Douglas
- Language: English
- Year: 2000
- Author: George W. Douglas
- Language: English
- Year: 2001
- Author: George W. Douglas
- Language: English
- Year: 2001
- Author: George W. Douglas
- Language: English
- Year: 1998
- Author: George W. Douglas
- Language: English
- Year: 1998
- Author: George W. Douglas
- Language: English
- Year: 1999
- Author: George W. Douglas, British Columbia. Ministry of Forests, British Columbia. Ministry of Environment Lands and Parks
- Language: English
- Year: 1998
- Author: George H. Douglas
- Language: English
- Year: 2021
- Author: George H. Douglas
- Language: English
- Year: 2021