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­ì¤åªº¥D­n°Ñ¦Ò¸ê®Æ¡G British Geological Survey et al., Characterization and Assessment of Groundwater Quality Concerns in Asia-Pacific Region (Oxfordshire, UK; 1996).

European Environmental Agency, Groundwater Quality and Quantity in Europe (Copenhagen: 1999).

Francis H. Chapelle, The Hidden Sea: Ground Water, Springs, and Wells (Tucson, AZ; GeoScience Press, Inc., 1997). 

U.N. Environment Programme. Groundwater: A threatened resource (Nairabi; 1996). 

U.S. Geological Survey, The Quality of Our Nation¡¦s Waters � Nutrients and Pesticides (Reston, VA; 1999).


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