- Author: D.G. Pettifor, A.H. Cottrell
- Language: English
- Year: 1992
- Author: R.W. Evans, B. Wilshire
- Language: English
- Year: 1993
- Author: Sequeira C. A. C., Tiller A. K
- Language: English
- Year: 1995
- Author: Randle Valerie
- Language: English
- Year: 1996
- Author: Charles J. A., Greer A. L
- Language: English
- Year: 2005
- Author: Randle Valerie
- Language: English
- Year: 2003
- Author: Saunders Nigel, West David Richard Frederick
- Language: English
- Year: 2002