TY  - RPRT
TI  - Maps showing distribution, composition, and age of early and middle Cenozoic volcanic centers in Idaho, Montana, west-central South Dakota, and Wyoming
AU  - R. G. Luedke
PY  - 1994
DO  - 10.3133/i2291c
UR  - https://pubs.usgs.gov/publication/i2291C
ID  - i2291C
ER  -