About: http://webisa.webdatacommons.org/402864297

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	the maps show sources of information, such as published reports, articles,
http://www.w3.org/ns/prov#wasQuotedFrom	archives.gov