Analysis of information sources in references of the Wikipedia article "Smiley" in English language version.
[Loufrani] points out that a smiley face was a key feature of a well-known promotional campaign for a radio network on America's East Coast in the late Fifties.
[Loufrani] points out that a smiley face was a key feature of a well-known promotional campaign for a radio network on America's East Coast in the late Fifties.
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