Não informado. (1974). AID research and development abstracts. Agency for International Development.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. AID Research and Development Abstracts. Washington: Agency for International Development, 1974.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. AID Research and Development Abstracts. Agency for International Development, 1974.
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