We bought a new house at that time, and it had a fallout shelter downtairs. How a hollow core door with an inch of clearance at the bottom would protect us from radiation was not explained, but someone has an excellent wine cellar these days.
Oh hell, I forgot about those.
My uncle still has one buried in his yard somewhere. We were going to dig it up in the '80 to prevent it from caving in, but everyone forgot were the stupid door was.
Its still there, somewhere.
My dad built an honest to god buried shelter. It was a quonset hut style steel building buried under 3+ feet of dirt with a filtered air pipe attached to a hand cranked blower. I used to love to crank the blower. Stocked with a months food, radio, geiger counter, batteries, etc. He had to replace the supplies once a year...especially the batteries...this was long before alkaline batteries and they had a short shelf life.