pioneer in television ratings, which he began tabulating in 1950. Prior to his
work in television ratings, he measured sales in drug stores and grocery stores
and measured the size of radio audiences.
"Nielsen, A.C.." YourDictionary, n.d. Web. 23 October 2018. <http://www.yourdictionary.com/nielsen-a-c>.
Nielsen, A.C.. (n.d.). Retrieved October 23rd, 2018, from http://www.yourdictionary.com/nielsen-a-c
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