00280nam a2200097Ia 4500008004100000082001800041100004100059245002900100264004300129300001000172200526s9999||||xx |||||||||||||| ||und||  a612.85  DUR L  aDurrant, John D. , Lovrinic, Jean H. 0aBases of Hearing Science  bThe Williams and Wilkins Companyc1977  a185p.