TY  - RPRT
TI  - Lithofacies of the Helena and Wallace formations (Belt Supergroup, middle Proterozoic), Montana and Idaho
AU  - C. A. Wallace
AU  - J. E. Harrison
AU  - D. J. Lidke
AU  - J. W. Whipple
PY  - 1999
UR  - https://pubs.usgs.gov/publication/70093959
ID  - 70093959
ER  -