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- [34] EXCERPTS FROM 11TH INTERNATIONAL-CONGRESS ON BOVINE DISEASES MODERN VETERINARY PRACTICE, 1981, 62 (02): : 123 - &
- [39] 11TH INTERNATIONAL EUROPEAN CONGRESS FOR GENERAL GASTROENTEROLOGISTS AND 4TH EUROPEAN CONGRESS FOR GASTROINTESTINAL ENDOSCOPY TERAPEVTICHESKII ARKHIV, 1981, 53 (10): : 151 - 154