| http://www.w3.org/ns/prov#value | - American families build them within 48 hours, including felling the trees and making improvised internal furnishings:This buried-pole shelter survived a peak overpressure of 40 psi in the Misers Bluff test, by detonating 200 tons of TNT beside it, as reported in Oak Ridge National Laboratory report ORNL-5541 (Blast Tests of Expedient Shelters in the Misers Bluff event, by Cresson H. Kearny, Conrad
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