(1998). Standard methods for the examination of water and wastewater. Washington: American Public Health Association.
Παραπομπή Chicago StyleStandard Methods for the Examination of Water and Wastewater. Washington: American Public Health Association, 1998.
Παραπομπή MLAStandard Methods for the Examination of Water and Wastewater. Washington: American Public Health Association, 1998.
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