605,284 SÖDERBERG OVE Transmyringeal middle ear ventilation : an experimental approach to evaluation of its benefits and consequences : /akademisk avhandling / by Ove Soderberg ; University of Umea. - Umea : University, 1985. - /2/ 38 s. ; 25 cm + wkł. /2/ s. (Umea University Medical Dissertations, ISSN 0346-6612 ; new ser. nr 146)