| Online link | http://pubs.usgs.gov/of/2006/1184/ |
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| Originators | Piatak, Nadine M.; Seal, Robert R. II; Sanzolone, Richard F.; Lamothe, Paul J.; and Brown, Z. A. |
| Publication | U.S. Geological Survey Open-File Report 2006-1184 This publication is available only as a PDF document. |