Samarasinha, G. G. De L. W Adopting of Drip Irrigation Systems : Problems and Options : Research Report : No. 156 - Hector Kobbekaduwa Agrarian Research and Training Institute Colombo 2013 - viii,30 pp 22 cm ISBN: 9789556121490 Nat. Bib. Agency Control No.: 631.587 SAM Subjects--Topical Terms: Specialized techniquesවිශේෂිත ශිල්ප ක්රම Dewey Class. No.: 631.587 / SAM