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1
Studies on the reproduction and artificial propagation of f..
United States congressional serial set ; serial set no. 6271;House document / 62nd Congress, 2nd session. House ; no. 907
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2
Department of Commerce and Labor. Bulletin of the Bureau of..
United States congressional serial set ; serial set no. 6036;House document / 61st Congress, 3rd session. House ; no. 1439