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- [7] NEWCASTLE-DISEASE - FIELD VACCINATIONS AND IMMUNITY IN BROILERS VLAAMS DIERGENEESKUNDIG TIJDSCHRIFT, 1980, 49 (02): : 86 - 93
- [8] THE USE OF CDF66 LENTOGENIC STRAIN OF NEWCASTLE-DISEASE VIRUS IN IMMUNIZATION PROTOCOLS AGAINST NEWCASTLE-DISEASE CHEIRON, 1982, 11 (04): : 172 - 177