00302nam a2200109Ia 4500008004100000041001200041082001100053100001800064245009800082260000600180650000600186221030s9999    xx            000 0 und d  aEnglish  a105.23  aV. Valkenburg 0aReference Data For Engineers :Radio, Electronics, Computer & Communicationscby V. Valkenburg  c0  aB