[Letter: The degree of infection of sputum in pneumologic practice. The objective parameters susceptible to characterization. Critical study].

@article{Michel1975LetterTD,
  title={[Letter: The degree of infection of sputum in pneumologic practice. The objective parameters susceptible to characterization. Critical study].},
  author={François B. Michel and Claude Bonfils and A. M. Clauzel and Jacques Gayraud},
  journal={La Nouvelle presse medicale},
  year={1975},
  volume={4 28},
  pages={2042-3}
}