Elbert (неопр.). U.S. NationalGeodeticSurvey. Дата обращения: 20 октября 2011. Архивировано 23 августа 2013 года. U.S. Geological Survey. Elevations and
Ogema. NGS data sheet. U.S. NationalGeodeticSurvey. (англ.) Timms Hill. Geographic Names Information System. U.S. Geological Survey. (англ.) Timms Hill
Columbus in the New World. Report of the Superintendent of the U. S. Coast and GeodeticSurvey (Appendix No. 18, June 1880). Washington: Government Printing
the Lambert Conformal Conic Projection This document from the U.S. NationalGeodeticSurvey describes the State Plane Coordinate System of 1983, including