American Public Health Association, A. W. W. A. (1999). Standard Methods for the Examination of Water and Wastewater. US.
Παραπομπή Chicago StyleAmerican Public Health Association, American Water Works Association. Standard Methods for the Examination of Water and Wastewater. US, 1999.
Παραπομπή MLAAmerican Public Health Association, American Water Works Association. Standard Methods for the Examination of Water and Wastewater. US, 1999.
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