Why general dentists refer patients to periodontists.

@article{Betof1985WhyGD,
  title={Why general dentists refer patients to periodontists.},
  author={N Betof and Leslie M Salkin and Raymond T. Ferris},
  journal={Journal of dental practice administration : JDPA : official publication of American Academy of Dental Practice Administration, Organization of Teachers of Dental Practice Administration, American Academy of Dental Group Practice},
  year={1985},
  volume={2 3},
  pages={106-10}
}