Não informado. (2004). Environmental geology notes. Illinois State Geological Survey.
Chicago Style (17th ed.) CitationNão informado. Environmental Geology Notes. Naperville, Ill: Illinois State Geological Survey, 2004.
MLA (8th ed.) CitationNão informado. Environmental Geology Notes. Illinois State Geological Survey, 2004.
Warning: These citations may not always be 100% accurate.