TY  - BOOK
ED  - American Public Health Association.
ED  - American Water Works Association.
ED  - Water Pollution Control Federation.
TI  - Selected analytical methods approved and cited by the United States Environmental Protection Agency  
U1  - 363.7284 SEL 1981 
PY  - 1981///
CY  - [New York]  
PB  - American Public Health Assn. 
KW  - Sewage
KW  - Analysis
KW  - Water
N1  - "Supplement to the Fifteenth Edition of Standard Methods for the Examination of Water and Wastewater."; Includes bibliographies
ER  -