About: http://webisa.webdatacommons.org/100404444

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	They are secondary sources and are especially valuable for the bibliographies included at the ends of entries.
http://www.w3.org/ns/prov#wasQuotedFrom	fandm.edu