| web | https://pubs.usgs.gov/fs/2021/3054/fs20213054.pdf |
| author | Anne M. Wein, Jamie L. Jones, Laurie A. Johnson, Cynthia Kroll, Jennifer Strauss, David Witkowski, and Dale A. Cox |
| publication | US Geological Survery (USGS) |
| date | 2021-10-01 |
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