http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Boundaries, areas, geographic centers and altitudes of the United States and the several states with a brief record of important changes in their territory
Geological Survey bulletin 689; Boundaries, areas, geographic centers, and altitudes of United States and the several States, with brief record of important changes in their territory
Record is based on bibliographic data in ProQuest U.S. Serial Set Digital Collection (last viewed Dec. 2009). Reuse except for individual research requires license from ProQuest, LLC.
ProQuest U.S. Serial Set Digital Collection