TY  - RPRT
TI  - A grading system for direct laryngoscopy.
AU  - R M Levitan
AU  - J E Hollander
AU  - E A Ochroch
PY  - 1999
DO  - 10.1046/j.1365-2044.1999.1133f.x
UR  - https://pubmed.ncbi.nlm.nih.gov/10541693/
ID  - 10541693
ER  -