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D.A.E. Mimeographed Circular

Louisiana Agricultural Experiment Station. Department of Agricultural Economics and Agribusiness

出版	Department of Agricultural Economics and Agribusiness, Louisiana State University and Agricultural and Mechanical College, Agricultural Experiment Station., 1986
URL	http://books.google.com.hk/books?id=gTY9AAAAYAAJ&hl=&source=gbs_api