- Author: Erin H. Fouberg, Alexander B. Murphy, H.J. de Blij
- Language: English
- Author: Erin H. Fouberg Alexander B. Murphy Harm J. de Blij
- Language: English
- Year: 2015
- Author: Erin H. Fouberg Alexander B. Murphy Harm J. de Blij
- Language: English
- Year: 2012
- Author: Erin H. Fouberg Alexander B. Murphy H. J. de Blij
- Language: English
- Year: 2009