TY  - RPRT
TI  - Pennsylvanian and Permian paleogeography, tectonics and stratigraphy in Montana and the Dakotas
AU  - E. K. Maughan
PY  - 1966
DO  - 10.3133/ofr6682
UR  - https://pubs.usgs.gov/publication/ofr6682
ID  - ofr6682
ER  -