- Author: W Ronald D Fairbairn, David E Scharff, Ellinor Fairbairn Birtles
- Language: English
- Year: 1994
- Author: W Ronald D Fairbairn, David E Scharff, Ellinor Fairbairn Birtles
- Language: English
- Year: 1994
- Author: W. Ronald D. Fairbairn
- Language: Spanish
- Year: 2001