TY  - RPRT
TI  - Delineation of background laboratory contamination in the analysis of trace concentrations of extractable organic materials in crystalline rocks by Soxhlet extraction, column chromotography, and gas chromatography
AU  - Koichi Mimura
AU  - L.C. Price
PY  - 1999
DO  - 10.3133/ofr99335
UR  - https://pubs.usgs.gov/publication/ofr99335
ID  - ofr99335
ER  -