Não informado. (1981). Environmental Monitoring and Assessment. Kluwer Academic Publishers.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Environmental Monitoring and Assessment. Dordrecht, Holanda: Kluwer Academic Publishers, 1981.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Environmental Monitoring and Assessment. Kluwer Academic Publishers, 1981.
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