Huge amount of sources is available on-line, some of questionable quality.
Many appear and disappear frequently.
We refer here to few that in our opinion are reliable.
Standard for Fallout Shelters Federal Emergency Management Agency TR-87, Sept. 1977.
Digest prepared by Dr. Y. Socol
Protect and Survive An Archive of UK Civil Defense Material, around 1980.
Short and concise manuals
