TY  - BOOK
AU  - Wahlmann,G.P.
TI  - Middle and Upper Ordovician symmetrical univalved mollusks (Monoplacophora and Bellerophontina) of the Cincinnati arch region
T2  - Geological Survey professional paper
AV  - QE805 .W35 1990
U1  - 564 20
PY  - 1992///
CY  - Washington
PB  - U.S. G.P.O.
KW  - Monoplacophora, Fossil
KW  - Middle West
KW  - Local
KW  - Paleontology
KW  - Middle west
KW  - Ordovician
KW  - Archaeogastropoda, Fossil
N1  - Includes bibliographical references
ER  -