[The significance of the most frequent errors causing uneven darkening of roentgen pictures].

@article{Pirk1961TheSO,
  title={[The significance of the most frequent errors causing uneven darkening of roentgen pictures].},
  author={F W Pirk and M PETRAKOVA},
  journal={Ceskoslovenska rentgenologie},
  year={1961},
  volume={15},
  pages={139-43}
}