About: http://webisa.webdatacommons.org/17242393

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	His diaries are a key documentary source for the history of the Soviet space program.
http://www.w3.org/ns/prov#wasQuotedFrom	astronautix.com