From Programmer's Digest, Volume 1, Issue 17 (June 18, 1973): WIOD, WQAM, WCMQ, WSHE, WFUN, WWOK, WBUS, WFAB, and WMYQ.
Narration is by Ken Douglas, then at KONO, San Antonio.
WWOK (Country) host Pat Appleson is the most energetic of the bunch; The late Chicago radio personality Robert L. Collins is featured with a very inappropriate comment on WMYQ as the last aircheck in this composite.