Dyfyniad APA

(2017).  Standard methods for the examination of water and wastewater: Including bottom sediments and sludges.  American Public Health Association.

Dyfyniad Arddull Chicago

 Standard Methods for the Examination of Water and Wastewater: Including Bottom Sediments and Sludges.  American Public Health Association, 2017.

Dyfyniad MLA

 Standard Methods for the Examination of Water and Wastewater: Including Bottom Sediments and Sludges.  American Public Health Association, 2017.

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