Não informado. (1999). Missouri geological survey and water resources. Tribune Printing.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. Missouri Geological Survey and Water Resources. Jefferson City, Mo: Tribune Printing, 1999.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. Missouri Geological Survey and Water Resources. Tribune Printing, 1999.
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