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The Journal of Pediatrics|June 1, 1992
Maternal vitamin levels during pregnancies producing infants with neural tube defectsJ L Mills, J Tuomilehto, K F Yu, et al.Health Services Research|December 1, 1996
Evaluation of the effectiveness of a community-based enriched model prenatal intervention project in the District of ColumbiaA A Herman, H W Berendes, K F Yu, et al.Pageof 4