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Summary of Illinois Farm Business Records, 1976, 52nd Annual

其他書名	Commercial Farms : Production, Costs, Income, Investments
出版	University of Illinois at Urbana-Champaign, College of Agriculture, Cooperative Extension Service, 1977
URL	http://books.google.com.hk/books?id=jSbnVMGVZvcC&hl=&source=gbs_api