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1
Aeronautics. Eighteenth annual report of the National Advis..
United States congressional serial set ; serial set no. 9667;Senate document / 72nd Congress, 2nd session. Senate ; no. 143
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2
Yearbook of the United States Department of Agriculture. 19..
United States congressional serial set ; serial set no. 7392;House document / 65th Congress, 2nd session. House ; no. 996
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3
Contributions to economic geology (short papers and prelimi..
United States congressional serial set ; serial set no. 7362;House document / 65th Congress, 2nd session. House ; no. 605