TY  - RPRT
TI  - Results of the U.S. Geological Survey's Analytical Evaluation Program for Standard Reference Samples Distributed in March 2000
AU  - Jerry W. Farrar
AU  - Ashley M. Copen
PY  - 2000
DO  - 10.3133/ofr00398
UR  - https://pubs.usgs.gov/publication/ofr00398
ID  - ofr00398
ER  -