"Überwachung" . . "Überwachung." . "Postüberwachung Deutschland (DDR) Geschichte." . . "Geschichte." . . "Telefon" . . "Telefon." . "Deutschland <DDR> Ministerium für Staatssicherheit" . . "Telefonüberwachung Deutschland (DDR) Geschichte." . . . . "Post" . . "Post." . . . . . "The conditions, means and methods of the MfS in the GDR an analysis of the post and telephone control" . . . . . "The conditions, means and methods of the MfS in the GDR; an analysis of the post and telephone control" . . . . . "The conditions, means and methods of the MfS in the GDR : an analysis of the post and telephone control" . "The conditions, means and methods of the MfS in the GDR : an analysis of the post and telephone control"@en . . . . . . . . . . . . . . . . . . "Staatsschutz Deutschland (DDR) Geschichte." . . "Siguranţă naţională Germania (Republica Democrată)" . . "Germania" . . "Geschichte" . .