http://www.flsenate.gov/Laws/Statutes/2012/Chapter70/All
http://www.glo.texas.gov/GLO/agency-administration/gis/
http://apps.leg.wa.gov/wac/default.aspx?cite=332-130-020
http://www.classicreader.com/book/3331/50/
http://www.historiclakes.org/explore/Montgomery.html
http://www.ngs.noaa.gov/OPUS/view.jsphttp://www.ngs.noaa.gov/OPUS/showMarks.jsp
https://www.ngs.noaa.gov/PC_PROD/VERTCON/
https://www.ngs.noaa.gov/web/surveys/NA2011/