TY  - RPRT
TI  - A proposal for upgrading the National-Scale Soil Geochemical Database for the United States
AU  - David B. Smith
AU  - Martin B. Goldhaber
AU  - Michael A. Wilson
AU  - Rebecca Burt
PY  - 2003
DO  - 10.3133/fs01503
UR  - https://pubs.usgs.gov/publication/fs01503
ID  - fs01503
ER  -