Não informado. (1999). Missouri geological survey and water resources. Tribune Printing.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Missouri Geological Survey and Water Resources. Jefferson City, Mo: Tribune Printing, 1999.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Missouri Geological Survey and Water Resources. Tribune Printing, 1999.
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