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Start Over 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 Polish ✖Remove constraint Languages: Polish Languages Swedish ✖Remove constraint Languages: Swedish Languages Russian ✖Remove constraint Languages: Russian Genre Bibliography ✖Remove constraint Genre: Bibliography Copyright Public domain ✖Remove constraint Copyright: Public domain