About: http://webisa.webdatacommons.org/429759916

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	Access to them required a trip to Houston, Washington DC, or other locations and for manual searches through binders, microfilm, or other catalogs, for which photographic reprints could be requested and produced.
http://www.w3.org/ns/prov#wasQuotedFrom	usra.edu