About: http://webisa.webdatacommons.org/305601842

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	The book also contains supplementary exercises and patterns for making some working astronomical instruments, including an astrolabe and an equatorium.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com.mx