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Summary of Illinois Farm Business Records, 1978, 54th Annual
D. F. Wilken
其他書名
Commercial Farms : Production, Costs, Income, Investments
出版University of Illinois at Urbana-Champaign, College of Agriculture, Cooperative Extension Service, 1978
URLhttp://books.google.com.hk/books?id=6lkXcpzL1DsC&hl=&source=gbs_api