TY  - RPRT
TI  - Phosphatic shale analytical quality control materials of the USGS Western U.S. Phosphate Project; bulk geochemical characterization and water leachate analysis
AU  - J. R. Herring
AU  - S. A. Wilson
PY  - 2001
DO  - 10.3133/ofr0124
UR  - https://pubs.usgs.gov/publication/ofr0124
ID  - ofr0124
ER  -