REFERENCES

CHINESE: The ministry of water Resources of the People’s Republic of

        China.

ENVIRONMENTAL WORKS: Types of sewage. Encyclopedia

         Britannica online. N.P, 2009. Wed October 9, 2009.

EPA: Protecting water Quality from Agricultural Runoff. Fact Sheet No.

        EPA­­­ – 841 – F – 05 – 001. March 2005.

MUNICIPAL: Waste water treatment          

        rest/training/aww/04_ domestic _ waste water_ presentation_ ver 4.

        Pdf.

UNITED STATES GEOLOGICAL SURVEY (USGS), DENVER, CO

        (1998): Ground water and surface water. A single Resource circular

        1139.      

   

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