TY  - RPRT
TI  - Visualizing the United States in computer chiaroscuro
AU  - Richard J. Pike
AU  - Gail Thelin
PY  - 1992
DO  - 10.1111/j.1467-8306.1992.tb01910.x
UR  - https://pubs.usgs.gov/publication/70243292
ID  - 70243292
ER  -