TY - RPRT TI - Hydrocarbon evaluation and structure contour map of part of the Choteau 1° x 2° quadrangle, Lewis and Clark, Teton, Powell, Missoula, Lake, Flathead and Cascade Counties, Montana AU - Melville Rhodes Mudge AU - Jerry L. Clayton AU - Kathryn M. Nichols PY - 1980 DO - 10.3133/ofr8024 UR - https://pubs.usgs.gov/publication/ofr8024 ID - ofr8024 ER -