Não informado. (1971). Seed Pathology News. Danish Government Institute of Seed Pathology for Developing Countries.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Seed Pathology News. Copenhagen: Danish Government Institute of Seed Pathology for Developing Countries, 1971.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Seed Pathology News. Danish Government Institute of Seed Pathology for Developing Countries, 1971.
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