Carstensen, L. W. (1986). Regional land information systems development using relational databases and geographic information systems. Proceedings of the AutoCarto, London, 507-516.
City of Ontario, California. (n.d.). Geographic information web server. Retrieved on July 6, 1999, from http://www.ci.ontario.ca.us/gis/index.asp (since retired).
Cowen, D. J. (1988). GIS versus CAD versus DBMS: What are the differences? Photogrammetric Engineering and Remote Sensing 54:11, 1551-1555.
DiBiase, D. and twelve others (2010). The New Geospatial Technology Competency Model: Bringing workforce needs into focus. URISA Journal 22:2, 55-72.
DiBiase, D, M. DeMers, A. Johnson, K. Kemp, A. Luck, B. Plewe, and E. Wentz (2007). Introducing the First Edition of the GIS&T Body of Knowledge. Cartography and Geographic Information Science, 34(2), pp. 113-120. U.S. National Report to the International Cartographic Association.
DiBiase, D, M. DeMers, A. Johnson, K. Kemp, A. Luck, B. Plewe, and E. Wentz (2006). Geographic Information Science and Technology Body of Knowledge. Association of American Geographers.
Ennis, M. R. (2008). Competency models: A review of the literature and the role of the employment and training administration (ETA). http://www.careeronestop.org/COMPETENCYMODEL/info_documents/OPDRLiteratureReview.pdf.
GITA and AAG (2006). Defining and communicating geospatial industry workforce demand: Phase I report.
Goodchild, M. (1992). Geographical information science. International Journal of Geographic Information Systems 6:1, 31-45.
Goodchild, M. (1995). GIS and geographic research. In J. Pickles (Ed.), Ground truth: the social implications of geographic information systems (pp. of chapter). New York: Guilford.
National Decision Systems. A zip code can make your company lots of money! Retrieved on July 6, 1999, from http://laguna.natdecsys.com/lifequiz (since retired).
National Geodetic Survey. (1997). Image generated from 15'x15' geoid undulations covering the planet Earth. Retrieved 1999, from http://www.ngs.noaa.gov/GEOID/geo-index.html (since retired).
Nyerges, T. L. & Golledge, R. G. (n.d.) NCGIA core curriculum in GIS, National Center for Geographic Information and Analysis, University of California, Santa Barbara, Unit 007. Retrieved November 12, 1997, from http://www.ncgia.ucsb.edu/giscc/units/u007/u007.html
United States Department of the Interior Geological Survey. (1977). [map]. 1:24 000. 7.5 minute series. Washington, D.C.: USDI.
United States Geologic Survey. "Bellefonte, PA Quadrangle" (1971). [map]. 1:24 000. 7.5 minute series. Washington, D.C.:USGS.
University Consortium for Geographic Information Science. Retrieved April 26, 2006, from http://www.ucgis.org
Wilson, J. D. (2001). Attention data providers: A billion-dollar application awaits. GEOWorld, February, 54.
Worboys, M. F. (1995). GIS: A computing perspective. London: Taylor and Francis.