"BUSINESS & ECONOMICS / Environmental Economics" . . . . . . "Improving smallholder farming systems in Imperata areas of Southeast Asia : alternatives to shifting cultivation"@en . . . . . . . . . . . . . . . . . "Improving smallholder farming systems in Imperata areas of Southeast Asia alternatives to shifting cultivation" . . . . "Electronic books" . . . . . . . . . "NATURE / Natural Resources" . . . . "BUSINESS & ECONOMICS / Green Business" . .