1. How do we verbalize what we see?;Acking;Landscape Archit.,1973
2. Predicting scenic beauty of forest environments;Arthur;For. Sci.,1977
3. Measuring Scenic Beauty: A Selected Annotated Bibliography;Arthur,1976
4. Development of the Arizona Environmental and Economic Trade-Off Model;Battelle Columbus Laboratories,1973
5. Colorado River Trips within the Grand Canyon National Park and Monument: A Socio-economic Analysis;Boster,1972