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- [1] EXPERIMENTAL STUDIES OF EFFECT OF CHRONIC AEROGENOUS TOXIC GAS EXPOSURE OF UNWEANED PIGLETS WITH AMMONIA OF VARIOUS CONCENTRATIONS .2. REACTION OF CELLULAR AND HUMORAL INFECTION DEFENSE-MECHANISMS OF AMMONIA EXPOSED UNWEANED PIGLETS UNDER CONDITIONS OF EXPERIMENTAL PASTEURELLA-MULTOCIDA INFECTION WITH AND WITHOUT THERMO-MOTOR STRESSO [J]. JOURNAL OF VETERINARY MEDICINE SERIES B-ZENTRALBLATT FUR VETERINARMEDIZIN REIHE B-INFECTIOUS DISEASES AND VETERINARY PUBLIC HEALTH, 1987, 34 (04): : 241 - 253