Use of tape-recorded heart sounds in screening of children for heart disease.

@article{Smith1959UseOT,
  title={Use of tape-recorded heart sounds in screening of children for heart disease.},
  author={Joseph Smith and Robert Austin Miller and C J Marienfeld and B M Hahneman and John E. Willard},
  journal={Circulation},
  year={1959},
  volume={20},
  pages={887-96}
}