Not much out there on the 'Doomsday Tapes", but did find one website that states:
"[doomsday tapes] are civil defense information for the general population to be broadcast if a nuclear attack seems imminent. Subjects included
medical effects of ionizing radiation, proper use and interpretation of radiation dosimeters and counters, design principles and construction of
various sorts of radiation fallout shelters, and so on. "
from www.ejectejecteject.com...
If anyone out there has any more info on these 'tapes' please post.


