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- [4] CAUTION ON PREVENTING NEURAL-TUBE DEFECTS BRITISH MEDICAL JOURNAL, 1981, 283 (6296): : 917 - 918
- [5] CAUTION ON PREVENTING NEURAL-TUBE DEFECTS BRITISH MEDICAL JOURNAL, 1981, 283 (6306): : 1605 - 1605
- [6] PRENATAL-DIAGNOSIS IN PREVENTING NEURAL-TUBE DEFECTS ZDRAVSTVENI VESTNIK, 1985, 54 (06): : 269 - 271