00277nam a2200097Ia 4500008004100000082002400041100003900065245002900104264003600133300001000169200526s9999||||xx |||||||||||||| ||und||  a617.807 5  VAL V; 2  aValent, Michael , Valente, Maureen 0aAdult Audiology Casebook  bThieme Medical Publishersc2015  a328p.