Links

Illinois State Geological Survey
http://www.isgs.uiuc.edu/

Illinois State University-Geography and Geology
http://www.geo.ilstu.edu/

Geotechnical Engineering
http://en.wikipedia.org/wiki/Geotechnical

American Society for Testing Materials (ASTM)
http://www.astm.org/

Canadian Building Digest– Soil Testing
http://irc.nrc-cnrc.gc.ca/pubs/cbd/cbd043_e.html

United States Geological Survey-Geology Discipline Homepage
http://geology.usgs.gov/index.shtml