RT Journal Article SR Electronic T1 Why Knowledge Gaps in Measurement Threaten the Value of Television Advertising JF Journal of Advertising Research JO J Advert Res FD WARC SP 9 OP 13 DO 10.2501/JAR-2019-008 VO 59 IS 1 A1 Artie Bulgrin YR 2019 UL http://www.journalofadvertisingresearch.com/content/59/1/9.abstract AB