TY  - RPRT
TI  - Lanthanide, yttrium, and zirconium anomalies in the Fire Clay coal bed, Eastern Kentucky
AU  - J.C. Hower
AU  - L.F. Ruppert
AU  - C.F. Eble
PY  - 1999
DO  - 10.1016/s0166-5162(98)00043-3
UR  - https://pubs.usgs.gov/publication/70021740
ID  - 70021740
ER  -