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Placer Mining at Volcano Amador County The dump and sluice NYPL bGF B. en Placer Mining at Volcano Amador County The dump and sluice nypl org Scan by NYPL Placer Mining at Volcano Amador County The dump and sluice no Gold mining Sluices The Miriam and Ira Wallach Division of Art Prints and Photographs Photography Collection baecffbfdabc