@misc{indiciae04df3640b1f9,
  title = {Proceedings of the U.S. Geological Survey Fourth Biennial Geographic Information Science Workshop: Denver, Colorado, April 23-27, 2001},
  author = {Jennifer B. Sieverling and Stephen J. Char and Carma A. San Juan},
  year = {2005},
  doi = {10.3133/sir20055117},
  url = {https://pubs.usgs.gov/publication/sir20055117},
  note = {Source identifier: sir20055117}
}