Excursions in southeastern geologyJames D. Howard, Robert W. Frey · First published 1985Open the Tome
Excursions in southeastern geologyRobert W. Frey, Thornton Lee Neathery · First published 1980Open the Tome
Paleoecology and depositional environment of Fort Hays limestone member, Niobrara Chalk (Upper Cretaceous) west-central KansasRobert W. Frey · First published 1972Open the Tome
Trace fossils of Fort Hays limestone member of Niobrara Chalk (upper cretaceous), west-central KansasRobert W. Frey · First published 1970Open the Tome
