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2004
Hogget mating in New Zealand - a survey, PR Kenyon, ST Morris, NR Perkins, and DM West , Proceedings of the New Zealand Society of Animal Production, Volume 64, Hamilton, p.217-222, (2004) , (Full PDF)
1998
Pregnancy diagnosis of twinning beef cows, MG Lambert, NR Perkins, BP Devantier, TW Knight, and K Betteridge , Proceedings of the New Zealand Society of Animal Production, Volume 58, p.259-261, (1998) , (Full PDF)