TY  - RPRT
TI  - Middle and Upper Ordovician nautiloid cephalopods of the Cincinnati Arch region of Kentucky, Indiana, and Ohio
AU  - R.C. Frey
PY  - 1995
DO  - 10.3133/pp1066p
UR  - https://pubs.usgs.gov/publication/pp1066P
ID  - pp1066P
ER  -