1. Hydrological processes and dryland degradation;Wallace;WMO Bulletin,1994
2. An International Action Programme on Water and Sustainable Agricultural Development: A Strategy for the Implementation ot the Mar del Plata Action Plan for the 1990s;FAO,1990
3. Institutional aspects of watershed management;Bottrall,1992
4. Water management in the 21st century;Hennessy;Keynote Address to the XVth ICID Congress, The Hague,1993
5. Small-scale Irrigation in Africa in the Context of Rural Development;Underhill,1990