Park, D Dysphagia. [electronic resource] - British medical journal Apr 1977 - 977 p. digital Publication Type: Letter ISSN: 0007-1447 Standard No.: 10.1136/bmj.1.6066.977-b doi Subjects--Topical Terms: Deglutition Disorders--therapyDilatationEsophageal Stenosis--surgeryHumans