I think there's an error regarding the number of concerts held at Louisville Convention Center
It states here in Q&A that there have only been seven concerts held at the old Louisville Convention Center, while I'm holding ticket stubs to seven concerts I attended there in the 70s that aren't even in your list of seven, so there have been at least 14 and I'm sure many more that I didn't attend but remember seeing them advertised. I saw there: Jethro Tull on 5-14-73, Yes on 3/2/74, Loggins & Messina on 8-16-73, Mountain on 12-13-73, ZZ Top & Marshal Tucker Band on 12-28-73, Igor Stravinsky, 9-17-76 (year uncertain) and Pink Floyd on 6-25-73.
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RockNRowBoat commented
I think I've discovered something since writing this suggestion. some if not all of my ticket stubs say Louisville Convention Center but I just learned that Louisville Gardens was renamed the Convention Center including the years I saw concerts at both places. I had thought I saw Pink Floyd at the Gardens, I didn't remember it also being called the Convention Center. My error. Oops.