Não informado. (1953). Netherlands Journal of Agricultural Science. Royal Netherlands Society for Agricultural Science.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Netherlands Journal of Agricultural Science. Wageningen, Holanda: Royal Netherlands Society for Agricultural Science, 1953.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Netherlands Journal of Agricultural Science. Royal Netherlands Society for Agricultural Science, 1953.
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