Scientific Investigations Report 2006-5122
U.S. GEOLOGICAL SURVEY
Scientific Investigations Report 2006-5122
The authors are grateful for technical reviews of the manuscript by Wayne Belcher, Jim Bartolino, and Steve Garabedian of the USGS, and for the many helpful comments and suggestions made over the years by USGS participants of internal program reviews, especially those of Keith Prince, Devin Galloway, and Claire Tiedeman.