TY  - BOOK
AU  - O.K.Spencer
ED  - United States Environmental Protencial Agency
TI  - The environmental protection agrncy four courners ambient air monitoring network: intergency energy-environment research and development program report 
U1  - 363.7063 
PY  - 1979///
CY  - Washington, D.C.
PB  - United States Government Printing Office
KW  - Pollution
KW  - Measurement
KW  - Environmental indicators
ER  -