| http://www.w3.org/ns/prov#value | - Unfortunately, there is no one good answer, but I have made some suggestions.Now there is a new book that covers the subject in detail, and has information about the shelters I have referred people to.The book is, No Such Thing As Doomsday: Underground Shelters and How to Prepare for Earth Changes, Wars & Other Threats by Philip L Hoag.
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