Annual data summary for air quality control regions 1, 2, 3, 4, 6, 8, 9, 11, and 12.
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| Format: | Serial |
| Language: | English |
| Published: |
[Austin]
[publisher not identified] ;
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| Published: | 19 -1975. |
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| Physical Description: | volumes ; 28 cm. |
| ISSN: | 0148-0774 |