TY  - RPRT
TI  - Map of segregated Choctaw and Chickasaw Indian coal lands in Oklahoma
AU  - Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey
PY  - 1940
DO  - 10.3133/ofr404
UR  - https://pubs.usgs.gov/publication/ofr404
ID  - ofr404
ER  -