Letterman, R. D. (1999). Water quality and treatment: A handbook of community water supplies. New York: McGraw-Hill.
Παραπομπή Chicago StyleLetterman, Raymond D. Water Quality and Treatment: A Handbook of Community Water Supplies. New York: McGraw-Hill, 1999.
Παραπομπή MLALetterman, Raymond D. Water Quality and Treatment: A Handbook of Community Water Supplies. New York: McGraw-Hill, 1999.
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