Sierra Sánchez, N. F. (2023). Rural Extension: The Vital Linkage Between Research and Agricultural Production. Coffee Experiences. Universidad Pedagógica y Tecnológica de Colombia.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रSierra Sánchez, Néstor Fabián. Rural Extension: The Vital Linkage Between Research and Agricultural Production. Coffee Experiences. Universidad Pedagógica y Tecnológica de Colombia, 2023.
एमएलए (9वां संस्करण) प्रशस्ति पत्रSierra Sánchez, Néstor Fabián. Rural Extension: The Vital Linkage Between Research and Agricultural Production. Coffee Experiences. Universidad Pedagógica y Tecnológica de Colombia, 2023.
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