Oddly enough, that telephone directory would be of great historical value. With today’s computers, a major city could be reconstructed with the information therein. A gold mine for history research, genealogy, demographics, etc.
Unfortunately, there are very few vintage telephone directories left, as nobody wanted to save them.
As far as fallout shelters go, most of the dangerous isotopes from a ground burst nuclear weapons fallout are gone within two weeks, which is why such shelters had a two week supply. And things would likely have been better than that in the US.
This is because US doctrine was to use ground burst nuclear weapons against Soviet population centers, but the Soviet policy was air burst weapons against military targets.
I have a friend who inherited his grandparents house with his grandfather’s old barbershop in the front. The barbershop closed in the late 50s and had nearly 60 years of history before that all sealed up like a museum.
I tried for years to talk my friend into handing it all over to the local museum but he would never do it and it was all lost in a fire.
There was all the barbershop equipment, old magazines, newspapers, the whole stroke. One very interesting thing were baseball scorecards from Detroit Tiger games going back to almost 1900. My friend’s grand dad used to cut hair, chat with customers while listening to the ball games on the radio and keep all the scoring while he did it.
I once bought a local phone book from the late 50’s. My step-mother’s mom and dad were listed, they still had the same address and phone number. I gave it to them. They enjoyed thumbing through it and looking up old friend’s names.