[Comparison of positive pressure respirators in clinical use].

@article{Haglund1955ComparisonOP,
  title={[Comparison of positive pressure respirators in clinical use].},
  author={G Haglund and K E Ekstrom and A WALDINGER},
  journal={Nordisk medicin},
  year={1955},
  volume={53 20},
  pages={806-10}
}