1. Hutchinson, Kansas: a geologic detective story;Allison;Geotimes,2001
2. Association of American State Geologists. About AASG; 2007. Retrieved September 2, 2014, from http://www.stategeologists.org/about_aasg/index.php.
3. Association of American State Geologists. The State Geologists Journal 2013:(65). Retrieved from http://www.stategeologists.org/temp/AASG%20Journal%202013.pdf.
4. The insanities of an exalted imagination: the troubled first geological survey of Pennsylvania;Boscoe;Pa Mag Hist Biogr,2003
5. Representing geoscientific knowledge in cyberinfrastructure: some challenges, approaches, and implementations;Brodaric;Geoinformatics,2006