3-D Software (2005). Map projections pages. Retrieved January 8, 2005, from http://www.3dsoftware.com/Cartography/
American Congress on Surveying and Mapping (n. d.). The North American Datum of 1983. A collection of papers describing the planning and implementation of the readjustment of the North American horizontal network. Monograph No. 2.
Burkard, R. K. et al. (1959-2002). Geodesy for the layman. Retrieved October 29, 2003, from the National Imagery and Mapping Agency Web site http://www.ngs.noaa.gov/PUBS_LIB/Geodesy4Layman/toc.htm
Chem-Nuclear Systems, Inc. (1993). Site screening interim report: Stage two -- regional disqualification. Harrisburg PA.
Chrisman, N. (2002). Exploring geographic information systems (2nd ed.). New York: John Wiley & Sons.
Clarke, K. (1995). Analytical and computer cartography (2nd ed.). Upper Saddle River, NJ: Prentice Hall.
Dana, P. H. (1998). Coordinate systems overview. The Geographer's Craft Project. Retrieved June 25, 2004, from The University of Colorado at Boulder, Department of Geography Web site: http://www.colorado.edu/geography/gcraft/notes/coordsys/coordsys.html
Dana, P. H. (1999). Geodetic datums overview. The Geographer's Craft Project. Retrieved June 25, 2004, from The University of Colorado at Bolder, Department of Geography Web site: http://www.colorado.edu/geography/gcraft/notes/datum/datum.html
Dewhurst, W. T. (1990). NADCON: The application of minimum-curvature-derived surfaces in the transformation of positional data from the North American datum of 1927 to the North American datum of 1983. NOAA Technical Memorandum NOS NGS 50. Retrieved January 1, 2005, from http://www.ngs.noaa.gov/PUBS_LIB/NGS50.pdf
Doyle, D. (2004, February). NGS geodetic toolkit, Part 7: Computing state plane coordinates. Professional Surveyor Magazine, 24:, 34-36.
Dutch, S. (2003). The Universal Transverse Mercator System. Retrieved January 9, 2008, from http://www.uwgb.edu/DutchS/FieldMethods/UTMSystem.htm
Federal Geographic Data Committee. (December 2001). United States National Grid. Retrieved May 8, 2006, from http://www.fgdc.gov/standards/projects/FGDC-standards-projects/usng/fgdc_std_011_2001_usng.pdf
Hildebrand, B. (1997). Waypoint+. Retrieved January 1, 2005, from http://www.tapr.org/~kh2z/Waypoint/
Iliffe, J.C. (2000). Datums and map projections for remote sensing, GIS and surveying. Caithness, Scotland: Whittles Publishing. Distributed in U.S. by CRC Press.
Larrimore, C. (2002). NGS Geodetic Toolkit. Retrieved October 26, 2004, from http://www.ngs.noaa.gov/TOOLS
Muehrcke, P. C. & Muehrcke, J. O. (1992). Map use (3rd ed.). Madison WI: JP Publications.
Muehrcke, P. C. & Muehrcke, J. O. (1998). Map use (4th ed.). Madison WI: JP Publications.
Mulcare, D. M. (2004). The National Geodetic Survey NADCON Tool. Professional Surveyor Magazine, February, pp. 28-33.
National Geodetic Survey. (n.d.). North American datum conversion utility. Retrieved April 2004, from http://www.ngs.noaa.gov/TOOLS/Nadcon/Nadcon.html
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).
National Geodetic Survey. (2004). Coast and geodetic survey historical image collection. Retrieved June 25, 2004, from http://www.photolib.noaa.gov/cgs/index.html
National Geographic Society (1999). Round earth, flat maps. Retrieved April 18, 2006, from http://www.nationalgeographic.com/features/2000/exploration/projections/index.html
Ordnance Survey (2000). National GPS network information. 7: Transverse mercator map projections. Retrieved August 27, 2004, from http://www.gps.gov.uk/guide7.asp
Robinson, A. et al. (1995). Elements of cartography (5th ed.). New York: John Wiley & Sons.
Robinson, A. H. & Snyder, J. P. (1997). Matching the map projection to the need. Retrieved January 8, 2005, from the Cartography and Geographic Information Society and the Pennsylvania State University web site: https://courseware.e-education.psu.edu/projection/
Slocum, T. A., McMaster, R. B., Kessler, F, C., & Howard, H. H. (2005). Thematic cartography and visualization (2nd ed.). Upper Saddle River, NJ: Prentice Hall.
Smith, J.R. (1988). Basic geodesy. Rancho Cordova CA: Landmark Enterprises.
Snyder, J. P. (1987). Map projections: A working manual (U.S. Geological Survey Professional Paper No. 1395). Washington DC: United States Government Printing Office.
Snyder, J. P. (1987). Map projections: A working manual. (USGS Professional Paper No. 1395). Washington DC: U.S. Geological Survey (Electronic versions available at http://pubs.er.usgs.gov/djvu/PP/PP_1395.pdf)
Snyder, J. P. & Voxland P. M. (1989). An album of map projections (U.S. Geological Survey Professional Paper No. 1453). Washington DC: United States Government Printing Office.
Snyder, J. P. & Voxland, P. M. (1994). An album of map projections. (USGS Professional Paper No. 1453). Washington DC: U.S. Geological Survey. (ordering information published at http://erg.usgs.gov/isb/pubs/factsheets/fs08799.html)
Stem, J. E. (1990). State Plane Coordinate System of 1983 (NOAA Manual NOS NGS 5). Rockville, MD: National Geodetic Information Center.
The Large Scale Biosphere-Atmosphere Experiment in Amazonia (1999, July 1). Retrieved July 12, 1999, from http://daacl.ESD.ORNL.Gov/lba_cptec/ (since retired).
United States Geological Survey (2001). The universal transverse mercator grid. Fact sheet 077-01. Retrieved June 30, 2004, from http://mac.usgs.gov/mac/isb/pubs/factsheets/fs07701.html (since retired).
United States Geological Survey (2003). National mapping program standards. Retrieved October 29, 2005, from http://rockyweb.cr.usgs.gov/nmpstds/nmas647.html
USGS. "State College Quadrangle" [map]. 7.5 minute series. Washington, D.C.: USGS, 1962.
Van Sickle, J. (2004). Basic GIS coordinates. Boca Raton FL: CRC Press.
Wikipedia. The free encyclopedia. (2006). World geodetic system. Retrieved May 8, 2006, from http://en.wikipedia.org/wiki/WGS84
Wolf, P. R. & Brinker, R. C. (1994) Elementary Surveying (9th ed.). New York NY: HarperCollins.