_:n3651d6a50a814f0f99caa89d7a804472xb0
<http://schema.org/description>
"ESOMAR/ARF Worldwide Broadcast Audience Research Symposium 1992 - Passive Measurement - Audience Research - Personal Portable Meter (Ppm) - Single Source System - English"
<https://ana.esomar.org/authors/stephen-a-douglas>