Yang, W. (1965). Methods of farm management investigations: For improving farm productivity. Food and agriculture organiation of the united nation.
Chicago-стиль цитированияYang, W.Y. Methods of Farm Management Investigations: For Improving Farm Productivity. Rome: Food and agriculture organiation of the united nation, 1965.
MLA-цитированиеYang, W.Y. Methods of Farm Management Investigations: For Improving Farm Productivity. Food and agriculture organiation of the united nation, 1965.
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