TY  - RPRT
TI  - Results of the U.S. Geological Survey's Analytical Evaluation Program for standard reference samples distributed in March 1999
AU  - Jerry W. Farrar
AU  - Kimberly M. Chleboun
PY  - 1999
DO  - 10.3133/ofr99259
UR  - https://pubs.usgs.gov/publication/ofr99259
ID  - ofr99259
ER  -