TY  - RPRT
TI  - Analytical methods utilized by the United States Geological Survey for the analysis of coal and coal combustion by-products
AU  - John H. Bullock
AU  - James D. Cathcart
AU  - William J. Betterton
PY  - 2002
DO  - 10.3133/ofr02389
UR  - https://pubs.usgs.gov/publication/ofr02389
ID  - ofr02389
ER  -