Clescerl, Leonore S.(Editor), Greenberg, Arnold E.(Editor), Eaton, Andrew D. (Editor). Standard Methods for the Examination of Water and Wastewater (20th ed.) American Public Health Association, Washington, DC. (ردمك 0-87553-235-7). This publication is also available on CD-ROM and onlineنسخة محفوظة February 11, 2016, على موقع واي باك مشين. by subscription.
Clescerl, Leonore S.(Editor), Greenberg, Arnold E.(Editor), Eaton, Andrew D. (Editor). Standard Methods for the Examination of Water and Wastewater (20th ed.) American Public Health Association, Washington, DC. (ردمك 0-87553-235-7). This publication is also available on CD-ROM and onlineنسخة محفوظة February 11, 2016, على موقع واي باك مشين. by subscription.