Não informado. (2004). EDS: Environmental Data Service. Environmental Data Service.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. EDS: Environmental Data Service. Washington: Environmental Data Service, 2004.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. EDS: Environmental Data Service. Environmental Data Service, 2004.
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