TY  - RPRT
TI  - National geochemical data base; PLUTO geochemical data base for the United States
AU  - Philip A. Baedecker
AU  - Jeffrey N. Grossman
AU  - Kim P. Buttleman
PY  - 1998
DO  - 10.3133/ds47
UR  - https://pubs.usgs.gov/publication/ds47
ID  - ds47
ER  -