TY - BOOK AU - Eaton,Andrew D. ED - American Public Health Association. ED - American Water Works Association. ED - Water Environment Federation. TI - Standard methods for the examination of water and wastewater SN - 0875530478 U1 - 628.161 21 PY - 2005/// CY - Washington, D. C. PB - APHA-AWWA-WEF KW - Water KW - Analysis KW - Sewage N1 - "Centennial edition" -- t.p; Joint editorial board: Andrew D. Eaton ... [et al.]; In the 21st edition new methods have been added in Parts 2000, 4000, 5000, 6000, 7000, 8000 and 9000, and numerous methods have been revised. Details of these changes appear on the reverse of the title page for each part. -- p. iv; Includes Supplement to the 21st edition (pp. S-1 to S-16); Includes bibliographical references and index; From 2004 also available by subscription online ER -