- Author: David H. Feeny
- Language: English
- Year: 1982
- Author: Peter H. Pearse
- Language: English
- Year: 1990
- Author: Glen Filson
- Language: English
- Year: 2004
- Author: Peter Bogetoft, Henrik Ballebye Olesen
- Language: English
- Year: 2007
- Author: National Research Council, Division on Earth and Life Studies, Environment and Resources Commission on Geosciences, Office of International Affairs, Board on Science and Technology for International Development, Commission on Engineering and Technical Systems, Water Science and Technology Board, Committee on International Soil and Water Research and Development
- Language: English
- Year: 1991
- Author: Welmoed Out
- Language: English
- Year: 2010