About: http://webisa.webdatacommons.org/246980230

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	This DVD defines types of mirrors and lenses and the different ways light is refracted and reflected from lighthouses to telescopes.
http://www.w3.org/ns/prov#wasQuotedFrom	christianbook.com