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The O.A.C. Short Course (720 Young Canadian Farmers & 30 Farmerettes Attended), OAC Review, V.52, No. 4, Jan. 1940, P. 212-213
OAC Review Index (University of Guelph)
出版1940
URLhttp://books.google.com.hk/books?id=uCjhcQAACAAJ&hl=&source=gbs_api