00306nam a2200109Ia 450000500170000000800410001708200160005810000190007424500500009326000450014330000080018820260224040925.0260224s9999||||xx |||||||||||||| ||und||  a001.510 ASC  aBarnouw, Erik, 0aInternational encyclopedia of communications   aNew York : Oxford University Pressc1989  a455