TY  - RPRT
TI  - Middle and Upper Ordovician symmetrical univalved mollusks (Monoplacophora and Bellerophontina) of the Cincinnati Arch region
AU  - G.P. Wahlman
PY  - 1992
DO  - 10.3133/pp1066o
UR  - https://pubs.usgs.gov/publication/pp1066O
ID  - pp1066O
ER  -