Sorry to point out another incorrect statement...but Arbitron/Nielsen had a handout called:
"Working with Arbitron's
Copyrighted Estimates"
It's still online here:
http://www.arbitron.com/downloads/Copyrights_mxeng.pdf
Then, there's this:
Successful Arbitron
Copyright Infringement in Southern District of NY: Obtained a favorable settlement for Arbitron in an action in the Southern District of New York in which defendant agreed to cease all further use of Arbitron’s copyrighted works.
http://www.winston.com/en/what-we-d...uthern-district.html?aj=ov&parent=1585&idx=11
And this: "You have to list the survey period,
the survey area, the demographic, the daypart, and
the estimate cited, along with our
copyright notice,
for example: “© 2002 Arbitron Inc."