TY  - RPRT
TI  - Contributions to economic geology (short papers and preliminary reports), 1923-1924: Part II. - Mineral fuels
AU  - K. C. Heald
AU  - W. T. Thom
PY  - 1925
DO  - 10.3133/b751
UR  - https://pubs.usgs.gov/publication/b751
ID  - b751
ER  -