Daddy Bone. Right on the money. The concerts were syndicated by Westwood One and would either be dedicated to a single artist or many. They contained spots that were mandatory to run in the show. These concerts could be used in their entirety in one airing providing stations enough time in the segments to sell local avails. For instance, a half hour of the vinyl might have actually been 23 1/2 minutes allowing for, say, two three minute local spot avails and 3 joiners/breakers/station ID. The shows, due to their configuration on the medium, could also be stripped out and used one or more segments at a time for, let's say, a noon time lunch special etc. The 89-24, I believe is the 24th week of 1989.