TY  - RPRT
TI  - Unusual, high-temperature, iron-rich, mineral phases produced by natural burning of coal seams; analytical data
AU  - J. R. Herring
AU  - P.J. Modreski
PY  - 1986
DO  - 10.3133/ofr8722
UR  - https://pubs.usgs.gov/publication/ofr8722
ID  - ofr8722
ER  -