About: http://webisa.webdatacommons.org/431946291

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	In looking at the history of early photographic apparatus and their makers since its beginnings, there were numerous ???How to ...??? publications and other ephemera that also took on the role of teaching photography.
http://www.w3.org/ns/prov#wasQuotedFrom	collectorsweekly.com