Air quality data for 1968 from the National Air Surveillance Networks and contributing state and local networks
Publisher: Environmental Protection Agency, Office of Air Programs ; Springfield, Va. : distributed by National Technical Information Service
Published: 1972
Place of publication: Research Triangle Park, N. C
Language: eng
Number of pages: 231
Subjects: Air; Pollution; Statistics; Measurement
Notes: "PB 2B-830."

Chiefly tables.