About: http://webisa.webdatacommons.org/283819507

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	That is quite a lot of money, but there may not be a cheap way to get a physical copy there if no resellers have it.There is an official place to get it online in PDF form, applianceshop.eu.
http://www.w3.org/ns/prov#wasQuotedFrom	pfsense.org