About: http://webisa.webdatacommons.org/319509944

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	correspondence mostly dates from 1960 to 1970 and documents both personal and professional activities.
http://www.w3.org/ns/prov#wasQuotedFrom	cdlib.org