[Focal theory in a crisis (author's transl)].

@article{Schwarz1973FocalTI,
  title={[Focal theory in a crisis (author's transl)].},
  author={E. Volterra Schwarz},
  journal={Das Offentliche Gesundheitswesen},
  year={1973},
  volume={35 11},
  pages={697-702}
}