[Maxillary sinus opacity in children: its relation to subacute & chronic bronchitis].

@article{WINCKEL1958MaxillarySO,
  title={[Maxillary sinus opacity in children: its relation to subacute & chronic bronchitis].},
  author={H VAN WINCKEL and R MAERTENS},
  journal={Acta paediatrica Belgica},
  year={1958},
  volume={12 2},
  pages={78-92}
}