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2. Childhood deafness in the European Community;Martin;Scand. Audiol.,1981
3. Results of audiometrical screening in Finnish schoolchildren;Marttila;Int. J. Pediatr. Otorhinolaryngol.,1986
4. Historical, political and technological context associated with early identification of hearing loss;Mauk,1993
5. Hearing disabled children — epidemiology and identification;Parving;Scand. Audiol. (Suppl.),1988