TY  - RPRT
TI  - Contributions to economic geology (short papers and preliminary reports), 1920 : Part II. - Mineral fuels
AU  - David White
AU  - Marius R. Campbell
PY  - 1921
DO  - 10.3133/b716
UR  - https://pubs.usgs.gov/publication/b716
ID  - b716
ER  -