00288nam a2200109Ia 4500008004100000041001200041082001100053100002000064245008200084260000600166650000600172221030s9999    xx            000 0 und d  aEnglish  a105.23  aJohn C. Hancock 3aAn Introduction to the Pricniples of Communication Theorycby John C. Hancock  c0  aB