California Board of Registration for Professional Engineers http://www.pels.ca.gov/
California Land Surveyors Association http://www.californiasurveyors.org/
California Land Surveyors Association, San Joaquin Valley Chapter http://www.sjvclsa.org/
American Congress on Surveying and Mapping http://www.acsm.net/
California State University at Fresno, Geomatics Engineering http://www.csufresno.edu/geomatics/
Mount Diablo Surveyors Historical Society http://www.mdshs.org/