00257nam a2200097Ia 4500008004100000082001400041100004500055245001900100264003100119300000900150200526s9999||||xx |||||||||||||| ||und||  a783 BUT B  aButenschon, Sine , Borchgrevink, Hans M. 0aVoice and Song  bCambridge Universityc1982  a62p.