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National Directory of Architectural, Engineering and Consulting Firms with Certified Fallout Shelter Analysts. (supersedes FG-F-1.3, Dated June 1968), Nov. 1969
註釋This directory is a listing of firms which as of Sept. 15, 1969 have indicated to the Office of Civil Defense that they employ on their immediate staff, architects and engineers who have successfully completed a course in Fallout Shelter Analysis sponsored by the Office of Civil Defense.