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13
Shorter contributions to general geology 1930. W.C. Mendenh..
United States congressional serial set ; serial set no. 9279;House document / 71st Congress, 2nd session. House ; no. 513
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14
Contributions to economic geology (short papers and prelimi..
United States congressional serial set ; serial set no. 8919;House document / 70th Congress, 1st session. House ; no. 241