Kool, R. (1960). Tropical agriculture and economic development. H. Veenmen & Zonen N.V.
Chicagoスタイル(17版)引用形式Kool, Rudolf. Tropical Agriculture and Economic Development. Wageningen, [The Netherlands]: H. Veenmen & Zonen N.V, 1960.
MLA(9版)引用形式Kool, Rudolf. Tropical Agriculture and Economic Development. H. Veenmen & Zonen N.V, 1960.
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