pubs.usgs.gov · UNITED STATES DEPARTMENT OF THE INTERIOR 67k saso 600 u r-ri stón Pass BECK...
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pubs.usgs.gov · UNITED STATES DEPARTMENT OF THE INTERIOR 67k saso 600 u r-ri stón Pass BECK TUNNEL NO.. MINE 6 ego 112005'30" 600 700 BULLETIN 1135-B PLATE 2
