While looking up old radio news I found this mention, what are they talking about?

Chicago Tribune July 25, 1985

— The Chicago Radio Guide is in trouble. Cofounder and financial backer Stephen Muka died of a lingering illness recently and his brother, Chris Muka, says the company can no longer survive while losing $35,000 each monthly issue. Accordingly, Chris is going to ask local stations to pay a small fee for being listed in the guide, which has a circulation of approximately 25,000.

(I found a pdf link online but it won't open)

1985 story