Design and execution of a very large birth-defects case-control study.

@article{Erickson1985DesignAE,
  title={Design and execution of a very large birth-defects case-control study.},
  author={J. D. Erickson and Joe Mulinare and Lisa M. James and T G Fitch},
  journal={Progress in clinical and biological research},
  year={1985},
  volume={163B},
  pages={273-7}
}