Vitamin B12 in pregnancy and the puerperium.

@article{Lowenstein1960VitaminBI,
  title={Vitamin B12 in pregnancy and the puerperium.},
  author={Louis Lowenstein and M Lalonde and E B Deschenes and Leonard Shapiro},
  journal={The American journal of clinical nutrition},
  year={1960},
  volume={8},
  pages={
          265-75
        }
}