Wiley/National Geographic College Atlas of the WorldRoger M. Downs, Harm J. de Blij, Roger Downs · First published 2007Open the Tome
National Geographic almanac of geographyRoger M. Downs, Frederick A. Day · First published 2005Open the Tome
Visions of aesthetics, the environment & developmentJoachim F. Wohlwill, Roger M. Downs, Lynn S. Liben, David Stuart Palermo · First published 1991Open the Tome
Approaches to, and problems in, the measurement of geographic space perceptionRoger M. Downs · First published 1967Open the Tome
