- Author: Izzy Hammond, Robert Potter
- Language: English
- Year: 2012
- Author: Hammond Robert H.
- Language: English
- Author: Steven W Bender, Celeste M Hammond, Robert M Zinman
- Language: English
- Year: 2018
- Author: Darke Rick, Hammond Robert, Oudolf Piet
- Language: English
- Year: 2017
- Author: Darke Rick, Hammond Robert, Oudolf Piet
- Language: English
- Year: 2017