00286nam a2200109Ia 4500008004100000041001200041082001100053100001900064245008100083260000600164650000600170221030s9999    xx            000 0 und d  aEnglish  a105.23  aJohn C. Hancok 3aAn Introduction to the Pricniples of Communication Theorycby John C. Hancok  c0  aB