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TRAFFIC ON MARKET STREET PHILADELPHIA'S MAIN EASTWEST ARTERY LOOKING WEST NARA .tif Scope and content General notes Local identifier DA Environmental Protection Agency NARAAuthor Swanson Dick Photographer File TRAFFICONMARKETSTREET PHILADELPHIA'SMAINEASTWESTARTERY LOOKINGWESTNARA tif tif File TRAFFICONMARKETSTREET PHILADELPHIA'SMAINEASTWESTARTERY