Methods of farm management investigations for improving farm productivity / 
Wei Yang 
 - Rome :  Food and Agriculture Organization of the United Nations,  1962. 
 - ix, 228 p. :  ill. ;  21 cm 
 - FAO agricultural development paper ;  no. 64 .
 - FAO agricultural development paper ;  no. 64. .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Farm management--Research.
<br/><br/><label>Dewey Class. No.: </label>631.072  / MET 1962