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Keywords from Image Description:
SIGN ON BRIDGE NEAR PPG PLANT PROTESTS AIR POLLUTION NARA . Scope and content General notes Local identifier DA Environmental Protection Agency NARAAuthor Vachon John Photographer File SIGNONBRIDGENEARPPGPLANTPROTESTSAIRPOLLUTIONNARA tif tif File SIGNONBRIDGENEARPPGPLANTPROTESTSAIRPOLLUTIONNARA NARAcooperation PDUSGov