The environmental protection agrncy four courners ambient air monitoring network :  intergency energy-environment research and development program report / 
D.E. Smith ... [et. al] 
 - Washington, D.C. :  United States Government Printing Office,  1979 
 - xiii, 83 p. ;  30 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Pollution--Measurement<br/>Environmental indicators
<br/><br/><label>Dewey Class. No.: </label>363.7063