TY  - RPRT
TI  - Results of the U. S. Geological Survey's Analytical Evaluation Program for Standard Reference Samples Distributed in March 2002
AU  - M.T. Woodworth
AU  - B.F. Conner
PY  - 2002
DO  - 10.3133/ofr02243
UR  - https://pubs.usgs.gov/publication/ofr02243
ID  - ofr02243
ER  -