TY  - BOOK
AU  - Environmental Protection Agency
TI  - Environmental monitoring
SN  - 0-309-02639-3
PY  - 1977///
CY  - Washington
PB  - National Research Council
KW  - Gestion Ambiental
KW  - Vigilancia Ambiental
KW  - Polucion
KW  - Proteccion Ambiental
ER  -