%0 Journal Article %T Pregnancy rates of mares inseminated with semen cooled for 18 hours and then frozen %A Backman, T. %A Bruemmer, J. E. %A Graham, J. K. %A Squires, E. L. %J Journal of Animal Science %V 82 %N 3 %P 690-694 %@ 0021-8812 %D 2004-03-01 %~ DeepDyve