1. Some comments on the relation between groundwater and wetlands;Carter,1988
2. Protecting America's wetlands: an action agenda, the final report of the National Wetland Policy Forum;Conservation Foundation,1988
3. Wetland conservation: a review of current issues and required action,1990
4. The implications of groundwater extraction for the longterm future of the Doñana National Park;Hollis;Report of the WWF/IUCN/ADENA Mission to the Doñana National Park,1989
5. Actualización de los datos hidro geológicos en los acuíferos de Almonte-Marismas y Mioceno de base, 1982. Modelo matemático bidimensional del sistema acuífero núm. 27. Unidad Almonte-Marismas. Memoria, planos y anejos;IGME,1982