File:Radio station WWJ advertisement (October 18, 1971).jpg
![File:Radio station WWJ advertisement (October 18, 1971).jpg](https://upload.wikimedia.org/wikipedia/commons/thumb/9/9a/Radio_station_WWJ_advertisement_%28October_18%2C_1971%29.jpg/437px-Radio_station_WWJ_advertisement_%28October_18%2C_1971%29.jpg?20190302184627)
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