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7
Keeping livestock healthy. Yearbook of Agriculture, 1942
United States congressional serial set ; serial set no. 10718;House document / 77th Congress, 2nd session. House ; no. 527
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8
Yearbook of Agriculture, 1937. United States Department of ..
United States congressional serial set ; serial set no. 10144;House document / 75th Congress, 1st session. House ; no. 28
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