TY  - BOOK
ED  - American Public Health Association
ED  - American Water Works Association.
TI  - Standard methods for the examination of water and waste water
U1  - 543.3 
PY  - 1981///
CY  - Washington
PB  - American Public Health Association
KW  - Agua
KW  - Análisis
KW  - Aguas residuales
KW  - Analisis
N1  - Sup. Selected analytical methods approved and cited by the United States Environmental Protection Agency (s.l.) 1981. 106 p
ER  -