Columbia subject headings:
Bronchoscopy--Atlases.
Esophagoscopy--Atlases.
Laryngoscopy--Atlases.
Nasopharyngoscopy--Atlases.
Pediatric otolaryngology--Atlases.
Pediatric respiratory diseases--Atlases.
Harvard subject headings:
Bronchoscopy--Atlases.
Esophagoscopy--Atlases.
Laryngoscopy--Atlases.
Nasopharyngoscopy--Atlases.
Pediatric otolaryngology--Atlases.
Pediatric respiratory diseases--Atlases.
Princeton subject headings: