TY  - BOOK
ED  - American Petroleum Institute, API
TI  - Relationship between air quality and human perception of scenic areas
U1  - 660.061.3 A512 4323 0008721 
PY  - 1980///
CY  - Washington
PB  - American Petroleum Institute, API
KW  - ContaminaciÃ³n atmosfÃ©rica
KW  - Calidad del aire
KW  - Higiene ambiental
KW  - Visibilidad
ER  -