Citation: D. Fichtner et al., USING THE INDIRECT IMMUNOFLUORESCENCE ASS AY (IIFA) FOR THE DETECTIONOF ANTIBODIES AGAINST VIRUS OF PORCINE REPRODUCTIVE AND RESPIRATORY SYNDROME (PRRS) (VOL 49, PG 223, 1994), Monatshefte fur Veterinarmedizin, 49(7), 1994, pp. 328-328