TY  - RPRT
TI  - Geochemical variation in a copper-bearing redbed sequence of the Ravalli Group (Belt Supergroup), northwestern Montana and northern Idaho; Part A, Geological interpretation
AU  - Jon J. Connor
PY  - 1991
DO  - 10.3133/ofr9128a
UR  - https://pubs.usgs.gov/publication/ofr9128A
ID  - ofr9128A
ER  -