Changes in rice harvesting systems in Central Luzon and Laguna / 
M. Kikuchi ... [et al.] 
 - Manila :  International Rice Research Institute,  1979 
 - 24 p :  ill. 
 - IRRI research paper series ;  no. 31 .
<br/><br/> Cover title. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Rice--Harvesting--Economic aspects.--Philippines