300,481 HEARING Hearing in the aged : The European Concerted Action Project : Proceedings of a workshop held in Helsingor, Denmark on November 26-29, 1989 / ed. by Gerhard Salomon. - [Stockholm] : [Almqvist anllWiksell International, [1990]. - 285 s.; il., wykr. ; 24 cm (Acta Oto-Laryngologica, ISSN 0365-5237 ; suppl. nr 476)