| Online link | https://doi.org/10.3133/fs20163034 |
|---|---|
| Description | Explains the goals of this scientific research program and the methods by which USGS carries out this research. |
| Originators | Wilkins, Aleeza M. and Doebrich, Jeff L. |
| Publication | U.S. Geological Survey Fact Sheet 2016-3034 This publication is available only as a PDF document. |