Maintenance and Operation (O&M) of Drainage and Irrigation Areas, A Case Study in Perak 

 - DID Perak  1980 
 - p. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>IRRIGATION.<br/>IRRIG.<br/>O&M.
<br/><br/><label>Subjects--Geographic Terms: </label><br/>Malaysia, Perak.