1. Association of State and Territorial Health Officials. (2003). State efforts to increase folic acid consumption and reduce neural tube defects. Retrieved September 18, 2003, from http://www.dphhs.state.mt.us/news/press_releases/march/folic_acid_best_practices.pdf
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3. Folic acid campaign and evaluation: Southwestern Virginia, 1997-1999;Morbidity and Mortality Weekly Report,1999
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5. Knowledge and use of folic acid among women of reproductive age: Michigan, 1998;Centers for Disease Control and Prevention;Morbidity and Mortality Weekly Report,2001