TY  - RPRT
TI  - Variability in results from mineralogical and organic geochemical interlaboratory testing of U. S. Geological Survey shale reference materials
AU  - Justin E. Birdwell
AU  - Stephen A. Wilson
PY  - 2019
DO  - 10.15530/urtec-2019-457
UR  - https://pubs.usgs.gov/publication/70206010
ID  - 70206010
ER  -