About: http://webisa.webdatacommons.org/35666885

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	Subseries might also be established for different types of correspondence, such as memoranda, postcards, greeting cards, letterpress books, etc.
http://www.w3.org/ns/prov#wasQuotedFrom	si.edu