1. Recommended Dietary Allowances,1989
2. Recommendations for the use of folic acid to reduce the number of cases of spina bifida and other neural tube defects;MMWR.,1992
3. Food labeling;Federal Register.,1996
4. Food standards;Federal Register.,1996
5. Food additives permitted for direct addition to food for human consumption; folic acid (folacin) (21 CFR 172);Federal Register.,1996