Methods of farm investigations for improving farm productivity.
Yang, Wei 1907-
Methods of farm investigations for improving farm productivity. - Rome, Italy Food and agriculture organization of the united nations 1965 - xiii, 258p. ill. 23cm.
Farm management--Research
Methods of farm investigations for improving farm productivity. - Rome, Italy Food and agriculture organization of the united nations 1965 - xiii, 258p. ill. 23cm.
Farm management--Research