[New rules for worker's and employee's social security].

@article{Grtler1979NewRF,
  title={[New rules for worker's and employee's social security].},
  author={Rainer G{\"u}rtler and W Pietrowiak},
  journal={Zeitschrift fur arztliche Fortbildung},
  year={1979},
  volume={73 9},
  pages={435-9}
}