Hurtgen, John P.Hanson, James O.2019-09-182019-09-181975https://hdl.handle.net/11299/2072251 online resource (PDF, 2 pages)This archival publication may not reflect current scientific knowledge or recommendations. Current information available from the University of Minnesota Extension: https://www.extension.umn.edu.enHeat detection and timing of breeding in the mareReport