TY  - RPRT
TI  - USGS Mineral Resources Program; national maps and datasets for research and land planning
AU  - S. W. Nicholson
AU  - D. B. Stoeser
AU  - S. D. Ludington
AU  - Frederic H. Wilson
PY  - 2001
DO  - 10.3133/fs07901
UR  - https://pubs.usgs.gov/publication/fs07901
ID  - fs07901
ER  -