1. Standard Methods for Examination of Waste Water;A.P.H.A.,1980
2. Geochemistry of hydric-soil salinity associated with wetlands in subhumid Prairie-Pothole Region, North Dakota, USA;Arndt,1989
3. Groundwater indicator plants in the Madrid aquifer;Bernáldez,1988
4. Landscape ecology of uncultivated lowlands in Central Spain;Bernáldez;Landscape Ecology,1989
5. Plants as indicators of groundwater chemical quality in Central Spain;Bernáldez,1989