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Genetic changes in a New Zealand pedigree Jersey herd : being a thesis presented in partial fulfilment of the requirements for the degree of M. Agri. Sc., Massey Agricultural College, University of New Zealand
(Massey University, 1952)
The majority of sires used in New Zealand herds are obtained from pedigree breeders and in consequence, the genetic merit of the national herd depends largely upon the quality of the pedigree section of the cattle breeding ...