Dunedin SoundIan Chapman, Jeff Harford, Natasha Griffiths, Roy Colbert, Amanda Hill · First published 2016Open the Tome
The Petrified Forest through the agesEdwin Harris Colbert, R. Roy Johnson · First published 1985Open the Tome
Factors affecting Wisconsin's economic outlookRoy Jefferson Colbert · First published 1954Open the Tome
Social Problems-The Century Social Science SeriesJohn Gillin, Clarence Dittmer, Roy Colbert, Norman Kastler · First published 1943Open the Tome
