Middle and Upper Ordovician symmetrical univalved mollusks (Monoplacophora and Bellerophontina) of the Cincinnati arch region
Wahlmann, G. P.
Middle and Upper Ordovician symmetrical univalved mollusks (Monoplacophora and Bellerophontina) of the Cincinnati arch region G.P. Wahlmann. - Washington U.S. G.P.O. 1992. - vi, 213, [90] p. ill. 29 cm. - Geological Survey professional paper 1066-0 .
Includes bibliographical references.
89600358
Monoplacophora, Fossil--Middle West.
Paleontology--Middle west.
Paleontology--Ordovician.
Archaeogastropoda, Fossil--Middle West.
QE805 / .W35 1990
564
I 19.16:1066-0
Middle and Upper Ordovician symmetrical univalved mollusks (Monoplacophora and Bellerophontina) of the Cincinnati arch region G.P. Wahlmann. - Washington U.S. G.P.O. 1992. - vi, 213, [90] p. ill. 29 cm. - Geological Survey professional paper 1066-0 .
Includes bibliographical references.
89600358
Monoplacophora, Fossil--Middle West.
Paleontology--Middle west.
Paleontology--Ordovician.
Archaeogastropoda, Fossil--Middle West.
QE805 / .W35 1990
564
I 19.16:1066-0