300,481 NEW New technologies for communication in the hearing impaired : Proceedings of a Workshop on magnetic and electrical activity of the auditory cortex Lisbon, January 28-31, 1990 / ed. by M. Hoke and Gregory R. Bock. - [Stockholm] Uppsala ; Alnqvist and Wiksell, 1991. - 184 s. : il., wykr. 25 cm (Acta Oto-Laryngologica, ISSN 0365-5237 ; suppl. 491)