Well, I’ll eat a bug. 
One of the things about radio writing (especially comedy) is it definitely wasn’t written with posterity in mind.
Sometimes the jokes have an extremely limited shelf-life – I guess that’s true of a lot of television writing today, too.
There was one joke that I didn’t really get on the Phil Harris/Alice Faye show for a long time. It’s the one where Phil is trying to get his band invited to Harry Truman’s inaugural shindig, and is frustrated because the White House won’t put him directly through to the man himself. He whines about it to his daughters, and one of them observes that it’s possible that the president has never heard of him. Phil says, “Of course he’s heard of me! I’m famous! I’m on the cover of the Radio Mirror!”
Big, long laughs, there. I always thought that it was a straight-forward gag about his ego, but after a while I was going through some scans of Radio Mirror covers and found the one for that week, which made the joke a bit clearer: It was the child actresses who play his daughters who had the cover, in colour. Phil and Alice had a tiny little postage stamp-sized (black+white) inset in the top right-hand corner. 