GeoData @ UCB

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1. California Air Basins, 2004

2004. California. Air Resources Board. Planning and Technical Support Division. and Stephen P. Teale Data Center (Calif.). . The California Air Basins layer is a polygon shapefile coverage representing the 15 California air basins, as defined in state statute and regulati... California. Air Resources Board.

2. California Air Districts, 2004

2004. California Air Resources Board; Planning and Technical Support Division and Stephen P. Teale Data Center (Calif.). . The California Air Districts layer is a polygon shapefile coverage representing the California air pollution control and air quality management dis... California. Air Resources Board.