Lapuran Kajian Pembangunan Pertanian Zon Kayan, Perak D. R. 

 - terhad 
 - Kuala Lumpur  Jabatan Pengairan dan Saliran Malaysia  [date of publication not identified] 
 - m/surat, illust. tinggi (cm) 
 - Soil Survey Report No.4 .
<br/><br/> note 
<br/><br/>Draft Final Report 
<br/><br/><label>Subjects--Topical Terms: </label><br/>SUBJECT.