Clicky Here to Watch How To Survive an Atom Bomb
What a startling "Adult " film.
I have a collection of Civil Defense pamphlets from the 50s and 60s and they have the same adult to adult, informational writing style.
The same pamphlets from the 80s talk down to the reader, and don't really give any usable information, it is mostly "try not to panic and wait for the govt." repeated in different ways.
That old black and white film at your link is a reminder of when we were a nation of grownups and men, and it has a lot of useful information.