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Contributions to economic geology, 1903. S. F. Emmons, C.W...
United States congressional serial set ; serial set no. 4685;House document / 58th Congress, 2nd session. House ; no. 677
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Contributions to economic geology, 1902, [by] S.F. Emmons [..
United States congressional serial set ; serial set no. 4505;House document / 57th Congress, 2nd session. House ; no. 437