Valencia, C. DA pursues organic farming of upland rice in Bicol. The Philippine Star.
Chicagoスタイル(17版)引用形式Valencia, Czeriza. "DA Pursues Organic Farming of Upland Rice in Bicol." The Philippine Star .
MLA(9版)引用形式Valencia, Czeriza. "DA Pursues Organic Farming of Upland Rice in Bicol." The Philippine Star, .
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