"Civil defense United States Periodicals." . . "Electronic journals" . . . . . . . . . . . . . . . . . "Semiannual report to the Congress"@en . . "Semiannual report to the Congress" . . . . . . . "Periodicals"@en . "Periodicals" . . . . . . . "United States. Department of Homeland Security. Office of Inspector General" . . "Civil defense" . . "United States. Department of Homeland Security" . . "United States" . .