<https://ana.esomar.org/documents/a-presentation-of-the-tv-radio-and-print-applications-of-the-first-intermedia-personal-meter>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<http://schema.org/WebPage>
<https://ana.esomar.org/authors/stephen-a-douglas>