http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
National Imagery and Mapping Agency nautical charts and publications public sale
Nautical charts and publications public sale
Vols. for 4th ed. have data as of July 1, 1998.
Each ed. updated up to next biennial ed. by National Ocean Service quarterly, "Dates of latest editions", reporting new and revised charts and publications (e.g. 4th ed. updated through 2000).
Defense Mapping Agency nautical charts and publications public sale. Region 9, East Asia
National Imagery and Mapping Agency nautical charts, public sale
United States. National Aeronautical Charting Office.