TY  - RPRT
TI  - Preliminary description of cores, chemical analyses of lignite beds, and map showing locations of holes drilled in Grant, Hettinger, Morton, and Stark Counties, North Dakota
AU  - H.L. Smith
PY  - 1970
DO  - 10.3133/ofr70308
UR  - https://pubs.usgs.gov/publication/ofr70308
ID  - ofr70308
ER  -