TY  - RPRT
TI  - Structure contour map of the Pondera oil field, Montana
AU  - Charles Edgar Erdmann
AU  - B.K. Koskinen
PY  - 1952
DO  - 10.3133/ofr5241
UR  - https://pubs.usgs.gov/publication/ofr5241
ID  - ofr5241
ER  -