TY  - RPRT
TI  - Maps of northeastern Oklahoma and parts of adjacent states showing the thickness and subsurface distribution of Lower Ordovician and Upper Cambrian rocks below the Simpson group
AU  - H.A. Ireland
AU  - John H. Warren
PY  - 1946
DO  - 10.3133/om52
UR  - https://pubs.usgs.gov/publication/om52
ID  - om52
ER  -