- Author: Leslie Clare Walker
- Language: English
- Year: 2015
- Author: Callicott J. Baird, Freyfogle Eric T., Leopold Aldo, Sanders Scott Russell, Temple Stanley A
- Language: English
- Year: 2014
- Author: Burroughs John
- Language: English
- Year: 2017
- Author: Whitefield Patrick
- Language: English
- Year: 2014