_:n3651d6a50a814f0f99caa89d7a804472xb0
<http://schema.org/mainEntityOfPage>
<https://ana.esomar.org/documents/a-presentation-of-the-tv-radio-and-print-applications-of-the-first-intermedia-personal-meter>
<https://ana.esomar.org/authors/stephen-a-douglas>