TY  - BOOK
AU  - Wahlman, G.
TI  - Middle and Upper Ordovician Symmmetrical Univaled Mollusks [ Monopiacophora and Bellerophontina ] of the Cincinnati Arch Region
PY  - 1992///
CY  - Washington
PB  - United States Government Printing Office
KW  - Monoplacophora, Fossil - Middle West
KW  - Archeogastropoda, Fossil - Middle West
KW  - Paleontology - Ordocician
KW  - Paleontology - Middle West
ER  -