TY  - RPRT
TI  - A national-scale geochemical and mineralogical survey of soils of the conterminous United States
AU  - David B. Smith
AU  - William F. Cannon
AU  - Laurel G. Woodruff
PY  - 2011
DO  - 10.1016/j.apgeochem.2011.03.116
UR  - https://pubs.usgs.gov/publication/70227299
ID  - 70227299
ER  -