TY  - RPRT
TI  - Geologic map of the Ponca quadrangle, Newton, Boone, and Carroll Counties, Arkansas
AU  - Mark R. Hudson
AU  - Kyle E. Murray
PY  - 2003
DO  - 10.3133/mf2412
UR  - https://pubs.usgs.gov/publication/mf2412
ID  - mf2412
ER  -