Não informado. Topographic instructions of the United States Geological Survey. U.S. Department of the Interior.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Topographic Instructions of the United States Geological Survey. Washington: U.S. Department of the Interior.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Topographic Instructions of the United States Geological Survey. U.S. Department of the Interior.
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