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1975
The effects of decreasing liveweight at mating on reproduction in Romney ewes, JL, Dobbie, RAS Welch, JG Ackerley, and DE Lake , Proceedings of the New Zealand Society of Animal Production, Jan, Volume 35, p.91, (1975)
1974
Diagnosing pregnancy in ewes by rectal palpation, JG, Ackerley, and RAS Welch , Proceedings of the New Zealand Society of Animal Production, Jan, Volume 34, p.55, (1974)