TY  - RPRT
TI  - Proceedings of the U.S. Geological Survey Fourth Biennial Geographic Information Science Workshop: Denver, Colorado, April 23-27, 2001
AU  - Jennifer B. Sieverling
AU  - Stephen J. Char
AU  - Carma A. San Juan
PY  - 2005
DO  - 10.3133/sir20055117
UR  - https://pubs.usgs.gov/publication/sir20055117
ID  - sir20055117
ER  -