Não informado. (1978). Agricultural Reviews and Manuals. Science and Education Administration.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Agricultural Reviews and Manuals. Berkeley, Calif: Science and Education Administration, 1978.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Agricultural Reviews and Manuals. Science and Education Administration, 1978.
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