Hartmut Albrecht. (1989). Rural development series: Agricultural extension; T1. Eschborn: Technical Cooperation - Federal Republic of Germany.
シカゴスタイル引用形Hartmut Albrecht. Rural Development Series: Agricultural Extension; T1. Eschborn: Technical Cooperation - Federal Republic of Germany, 1989.
MLA引用形式Hartmut Albrecht. Rural Development Series: Agricultural Extension; T1. Eschborn: Technical Cooperation - Federal Republic of Germany, 1989.
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