Wilde PE, McNamara PE, Ranney CK. 2000. The Effect on Dietary Quality of Participation in the Food Stamp and WIC Programs. Washington, DC: U.S. Department of Agriculture.
Williams LJ, Mai CT, Edmonds LD, Shaw GM, Kirby RS, Hobbs CA, Sever LE, Miller LA, Meaney FJ, Levitt M. 2002. Prevalence of spina bifida and anencephaly during the transition to mandatory folic acid fortification in the United States. Teratology 66(1): 33–39.
Woelfel ML, Abusabha R, Pruzek R, Stratton H, Chen SG, Edmunds LS. 2004. Barriers to the use of WIC services. J Am Diet Assoc 104(5):736–743.
Wu-Tso P, Yeh IL, Tam CF. 1995. Comparisons of dietary intake in young and old Asian Americans: A two-generation study. Nutr Res 15(10):1445–1462.
Wynckel A, Jaisser F, Wong T, Drüeke T, Chanard J. 1991. Intestinal absorption of calcium from yogurt in lactase-deficient subjects. Reprod Nutr Dev 31(4):411–418.
Yip R, Binkin NJ, Fleshood L, Trowbridge FL. 1987. Declining prevalence of anemia among low-income children in the United States. JAMA: J Am Med Assoc 258(12):1619–1623.