TY  - RPRT
TI  - Methods of analysis by the U.S. Geological Survey National Water Quality Laboratory-Determination of chromium in water by graphite furnace atomic absorption spectrophotometry
AU  - B.J. McLain
PY  - 1993
DO  - 10.3133/ofr93449
UR  - https://pubs.usgs.gov/publication/ofr93449
ID  - ofr93449
ER  -