TY  - RPRT
TI  - Radioactive Elements in Coal and Fly Ash: Abundance, Forms, and Environmental Significance
AU  - Robert A. Zielinski
AU  - Robert B. Finkelman
PY  - 1997
DO  - 10.3133/fs16397
UR  - https://pubs.usgs.gov/publication/fs16397
ID  - fs16397
ER  -