A preschool screening program, Central Vancouver island health unit, 1970-1971.
D000367:Age Factors; D001955:British Columbia; D002675:Child, Preschool; D005260:Female; D006311:Hearing Disorders / Q000175:diagnosis; D006801:Humans; D008297:Male; D008403:Mass Screening; D012572:School Health Services; D014786:Vision Disorders / Q000175:diagnosis