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Item Return to Cyclic Activity of Sows After Fasting(North Dakota State University, 1978) Johnson, John N.; Tilton, J. E.; Allrich, R. D.Item Factors Affecting Rebreeding Performance of Weaned Sows(North Dakota State University, 1978) Marcheno, M. J.; Zimprich, R. C.; Slanger, William D.; Johnson, J. N.; Tilton, J. E.; Allrich, R. D.