http://www.clui.org/section/point-beginninghttp://en.wikipedia.org/wiki/File:Beginning_Point_of_the_U.S._Public_Land_Survey_front.jpghttp://www.hmdb.org/marker.asp?marker=33685http://www.bchistory.org/beavercounty/BeaverCountyTopical/geologicalinformation/PublicLandSurveyMSA77/LandSurveyMSA77.htmlhttp://www.sos.mo.gov/adrules/csr/current/10csr/10c30-3.pdf