Hamilton, M A The treatment and prevention of chronic otorrhoea in the Northland health district. [electronic resource] - The New Zealand medical journal Oct 1977 - 327-9 p. digital Publication Type: Comparative Study; Journal Article ISSN: 0028-8446 Subjects--Topical Terms: ChildChild, PreschoolChronic DiseaseHealth EducationHumansMobile Health UnitsNew ZealandOtitis Media--diagnosisTherapeutic Irrigation