543,872 NORMAL Normal and abnormal development of hearing and its clinical implications / ed. by J.J. Eggermont and G.R. Bock. - Nijmegen ; /Distributed by the Almqvist and Wiksell Periodical Co., Stockholm] 1985 - 128 s : il.f wykr. ; 25 cm (Acta Oto-Laryngologica, ISSN 0365-5237 ; suppl. 421 )