TY  - RPRT
TI  - Results of the U.S. Geological Survey's analytical evaluation program for standard reference samples; T-153 (trace constituents), M-146 (major constituents), N-57 (nutrient constituents), N-58 (nutrient constituents), P-30 (low ionic strength constituents), GWT-3 (ground-water trace constituents), GWM-3 (ground-water major constituents) and Hg-26 (mercury) distributed in April 1998
AU  - Jerry W. Farrar
PY  - 1998
DO  - 10.3133/ofr98391
UR  - https://pubs.usgs.gov/publication/ofr98391
ID  - ofr98391
ER  -