TY - RPRT TI - Subsurface geology and oil and gas resources of Osage County, Oklahoma. Part 7, Townships 20 and 21 north, ranges 11 and 12 east AU - W.R. Dillar AU - N. W. Bass AU - C. T. Kirk PY - 1941 DO - 10.3133/b900g UR - https://pubs.usgs.gov/publication/b900G ID - b900G ER -