- Author: Geoff Crowther, Hugh Finlay, Prakash A. Raj, Tony Wheeler
- Language: English
- Year: 1990
- Author: Geoff Crowther Prakash A. Raj and Tony Wheeler
- Language: English
- Year: 1987
- Author: Prakash A. Raj
- Language: English
- Year: 1985
- Author: Prakash A. Raj
- Language: English Nepali
- Year: 2002