TY  - RPRT
TI  - Type sections of the Madison Group (Mississippian) and its subdivisions in Montana
AU  - William Jasper Sando
AU  - J. Thomas Dutro
PY  - 1974
DO  - 10.3133/pp842
UR  - https://pubs.usgs.gov/publication/pp842
ID  - pp842
ER  -