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Economic analysis of sire selection decisions by Ontario dairy farmers
- Economic analysis of sire selection decisions by Ontario dairy farmers / Alfons Weersink, Wayne Howard. -- Guelph : University of Guelph, 1990. -- 12 s. -- (Working papers series 16/1990). býky plemenné * farmy mliečne * plemenárstvo dobytka
Počet záznamov: 1