00563cam a2200169 a 4500 9712201538 DLC 633 INT 2001 A052 Or. Roder, Walter. Slash-and-burn rice systems in the hills of Northern Lao PDR : description, challenges, and opportunities / [Los Baños] : International Rice Research Institute, 2001. vi, 201 p. : ill., map ; 28 cm. Upland rice Shifting cultivation International Rice Research Institute. EK 14555 14555 0 0 0 633_000000000000000_INT_2001_A052_OR 0 66866 LBA LBA A052 2017-10-19 633 INT 2001 A052 Or. A17775 2017-10-19 2017-10-19 EK