- Author: Reinder Bruinsma
- Language: English
- Year: 2018
- Author: Reinder Bruinsma
- Language: English
- Year: 2018
- Author: William G. Johnsson
- Language: Spanish
- Year: 2017
- Author: Knight George R.
- Language: Spanish
- Year: 2017
- Author: George R. Knight
- Language: English
- Year: 2017