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Experiments in Breeding Holstein-Friesian Cattle for Milk and Butterfat Producing Ability, and an Analysis of the Foundation Cows and of the First Out-Bred Generation
Fohrman, M. H., (1939)
Experiments in breeding Holstein-Friesian cattle for milk- and butterfat-producing ability, and an analysis of the foundation cows and of the first outbred generation
Weight and Capacity of the Dairy Cow Udder in Relation to Producing Ability, Age, and Stage of Lactation
Matthews, C.A., (1949)