Surgical correction of atrial septal defects.

@article{Johansson1959SurgicalCO,
  title={Surgical correction of atrial septal defects.},
  author={Lars Johansson and Arne Senning},
  journal={Acta chirurgica Scandinavica. Supplementum},
  year={1959},
  volume={Suppl 245},
  pages={283-96}
}