About: http://webisa.webdatacommons.org/210978239

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	Most of their numbers are original to the era and were obtained from the Library of Congress and other collections, while others have been edited for clarity and errors or scored as they would have been for the time.
http://www.w3.org/ns/prov#wasQuotedFrom	presspublications.com