When it comes to prepping for nuclear war the best book reference out there, in my opinion, is the " Nuclear War survival skills book" You can copy it free on-line. To buy the book the best place is at "emergency essentials" for $12.95 each. The only problem with the internet version is the diagrams are not to scale, and will not work.
The book covers everything about preparing for a nuclear disaster. You can order tapes that show you how to do some of the things covered in the book, I bought them and thought they were well worth it.