N A De Ridder. (1977). Optimum use of water resources. Wageningen: ILRI.
Trích dẫn kiểu ChicagoN A De Ridder. Optimum Use of Water Resources. Wageningen: ILRI, 1977.
MLA CitationN A De Ridder. Optimum Use of Water Resources. Wageningen: ILRI, 1977.
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