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An Economic Analysis of Alternative Dry-lot Feeding Systems for Lactating Dairy Cows

Fred B. SaundersJerry W. BradenNeil W. CameronOlin T. FosgateEdward E. WorleyDean D. Hayes

出版	University of Georgia, College of Agriculture Experiment Stations, 1970
URL	http://books.google.com.hk/books?id=hAQyzgEACAAJ&hl=&source=gbs_api