00506nam a2200157 a 450000100080000000500110000800800410001910000180006024501220007826000700020065000090027065000280027965000100030765300130031770000180033020771752017-10-10       1963    bl uuuu     u0uu1 u    #d1 aWATSON, W. A.  aA three-year laboratory study of pathological material received from Yorkshire sheep flocks with an abortion problem.  aThe Veterinary Record, v. 75, n. 24, p. 625-629, Jun. 1963.c1963  aEwes  aPregnancy complications  aSheep  aAbortion1 aVESSEY, M. P.