Bernd Schubert. (1991). A logical framework for planning agricultural research programs. Philippines: IRRI.
シカゴスタイル引用形Bernd Schubert. A Logical Framework for Planning Agricultural Research Programs. Philippines: IRRI, 1991.
MLA引用形式Bernd Schubert. A Logical Framework for Planning Agricultural Research Programs. Philippines: IRRI, 1991.
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