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USGS Pub https://t.co/ZD8jwyQ7sQ via @USGS_Pubs
USGS Pub https://t.co/ZD8jwyQ7sQ via @USGS_Pubs
My latest report on mine related metals in the Big River of the old lead belt and the Barite District. USGS Pub https://t.co/ZD8jwyQ7sQ via @USGS_Pubs