South Dakota State University
This publication provides various management practices to increase the productivity of the ewe flock. It discusses target dates, a timeline for early lambing, production records, lambing difficulties, and artificial rearing of lambs, as well as management of the flock, lambs, and wool.
Thompson, J. M. and Bush, L. F., "Sheep Production Guide" (1985). SDSU Extension Circulars. 928.