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Stärk, KDC; Miserez, R; Siegmann, S; Ochs, H; Infanger, P; Schmidt, J (2007). A successful national control programme for enzootic respiratory diseases in pigs in Switzerland. Revue scientifique et technique, 26(3), pp. 595-606. Paris: International Office of Epizootics 10.20506/rst.26.3.1768