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3
Shorter contributions to general geology, 1921, [by] David ..
United States congressional serial set ; serial set no. 8031;House document / 67th Congress, 2nd session. House ; no. 323
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Contributions to economic geology (short papers and prelimi..
United States congressional serial set ; serial set no. 8023;House document / 67th Congress, 2nd session. House ; no. 320