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Stärk, K D; Frei-Stäheli, C; Frei, P P; Pfeiffer, D U; Danuser, J; Audigé, L; Nicolet, J; Strasser, M; Gottstein, Bruno; Kihm, U (1997). [Frequency and cost of health problems in Swiss dairy cows and their calves (1993-1994)]. Schweizer Archiv für Tierheilkunde, 139(8), pp. 343-353. Huber
