After researching this and some of the other Sound 10 Surveys and promotional photos given to listeners, I found that WCFL and/or the Chicago Federation of Labor did not mark any of this material with any type of copyright mark or other notification.
There are no copyright marks or statements on either side of this survey. What is seen on the other side of it at the lower right is a mark indicating that the material was printed by union printers. (This would be in keeping with a radio station owned and operated by a union.) WCFL AM was sold by the Chicago Federation of Labor in 1978. The call letters disappeared from AM Radio in 1987.
The item can be dated by the information on the other side of the survey at the link above, "Week ending October 6, 1966".
{{Non-free use rationale
|Article = Jimmy Staggs
|Description = WCFL Sound 10 Survey, October 1966, featuring Jim Stagg with the Beatles.
|Source = [http://www.fabfourfaq.com/pics/big/stagghitline-big.jpg Fab Four FAQ] WCFL R