Betty Korvan interview from March, 1979
Though RMR was predominantly a top 40 and disco format trade, it did substantial coverage of WMMS due to its distinguishing format. Nearly everyone who worked at WMMS in the late ‘70s was interviewed by RMR.
I just came upon this interview Chuck Dunaway did with Betty Korvan, which appeared in RMR on March 19, 1979.
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