TY  - RPRT
TI  - Cambrian through Mississippian rocks of the Powder River basin, Wyoming, Montana, and adjacent areas
AU  - David L. Macke
PY  - 1993
DO  - 10.3133/b1917m
UR  - https://pubs.usgs.gov/publication/b1917M
ID  - b1917M
ER  -