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McGuirk, B.J., Ponzoni, R., Atkins, K.D., Gilmour, A.R., Morley, F.H.W. & Maher, L., 1981. Factors influencing the time required to shear Merino sheep and its importance as a breeding objective. Aust. J. Exp. Agric. Anim. Husb. 21, 387-394.