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Start Over Formats Text ✖Remove constraint Formats: Text Subjects Civil Defense ✖Remove constraint Subjects: Civil Defense Subjects Bombs ✖Remove constraint Subjects: Bombs Authors United States. Work Projects Administration (Washington, D.C.), author, issuing body. ✖Remove constraint Authors: United States. Work Projects Administration (Washington, D.C.), author, issuing body. Languages English ✖Remove constraint Languages: English Languages German ✖Remove constraint Languages: German Languages Swedish ✖Remove constraint Languages: Swedish Genre Bibliography ✖Remove constraint Genre: Bibliography