Yang, W. (1965). Methods of farm management investigations: For improving farm productivity. Food and agriculture organiation of the united nation.
Dyfyniad Arddull ChicagoYang, W.Y. Methods of Farm Management Investigations: For Improving Farm Productivity. Rome: Food and agriculture organiation of the united nation, 1965.
Dyfyniad MLAYang, W.Y. Methods of Farm Management Investigations: For Improving Farm Productivity. Food and agriculture organiation of the united nation, 1965.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.