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Shifting cultivation in Southeastern Asia
Spencer, Joseph Earle, (1966)
Land settlement for agriculture
Binns, Bernard O., (1951)
Paddy soils in tropical Asia : their material nature and fertility
Kawaguchi, Keizaburó, (1977)
Planter and peasant : colonial policy and the agrarian struggle in East Sumatra 1863 - 1947
Pelzer, Karl J., (1978)
The agrarian conflict in East Sumatra
Pelzer, Karl J., (1957)
The agricultural foundation
Pelzer, Karl J., (1971)