R. Frey

发表

The paleoecology of a Late Ordovician shale unit from southwest Ohio and southeastern Indiana

R. Frey, 1987, Journal of Paleontology.

Paleoecology of Commensal Epizoans Fouling Flexicalymene (Trilobita) from the Upper Ordovician, Cincinnati Arch Region, USA

L. Babcock, Dan L. Cooper, M. Key, 2010, Journal of Paleontology.

Paleoecology of a well-preserved nautiloid assemblage from a Late Ordovician shale unit, southwestern Ohio

R. Frey, 1989, Journal of Paleontology.

A well-preserved specimen of Schuchertoceras (Cephalopoda, Ascocerida) from the Upper Ordovician (basal Richmondian) of Southwest Ohio

R. Frey, 1985 .

Narthecoceras (Cephalopoda) from the Upper Ordovician (Richmondian) of Southwest Ohio

R. Frey, 1981 .

The occurrence of pelecypods in early Paleozoic epeiric-sea environments, Late Ordovician of the Cincinnati, Ohio area

R. Frey, 1987 .

Ordovician Nautiloid Cephalopod Faunas from Southeastern British Columbia: Biostratigraphic and Biogeographic Significance

R. Frey, B. Norford, 1995 .

Human Well-Being in Chinese Cities

Fengxiang Song, R. Frey, R. S. Frey, 1997 .

Middle and Upper Ordovician nautiloid cephalopods of the Cincinnati Arch region of Kentucky, Indiana, and Ohio

R. Frey, 1995 .