- Author: Heeger Alan J
- Language: English
- Year: 2016
- Author: Brown Jeannette Elizabeth
- Language: English
- Year: 2018
- Author: Brown Jeannette Elizabeth
- Language: English
- Year: 2018
- Author: Cowan G. A., Cowan G. A., Cowan George A.
- Language: English
- Year: 2010