TY  - RPRT
TI  - Temporal and spatial variations in fly ash quality
AU  - J.C. Hower
AU  - A.S. Trimble
AU  - C.F. Eble
PY  - 2001
DO  - 10.1016/s0378-3820(01)00193-x
UR  - https://pubs.usgs.gov/publication/70023083
ID  - 70023083
ER  -