00516cam a2200145 a 4500020001500000040000800015082002600023100001900049245011300068260006700181300003800248650001600286650002500302710004300327  a9712201538  cDLC  a633 INT 2001 A052 Or.1 aRoder, Walter.10aSlash-and-burn rice systems in the hills of Northern Lao PDR :bdescription, challenges, and opportunities /  a[Los Baños] :bInternational Rice Research Institute,c2001.  avi, 201 p. :bill., map ;c28 cm. 0aUpland rice 0aShifting cultivation2 aInternational Rice Research Institute.