@book{oai:ir.ide.go.jp:00040220,
 author = {Tsutomu, Takane},
 month = {},
 note = {FWGH/63/Aj1, application/pdf, OPS003700_008},
 publisher = {Institute of Developing Economies (IDE-JETRO)},
 title = {5. Economic Differentiation},
 year = {2002}
}