00314nam a2200145Ia 4500008004100000020000900041035001000050082001700060100001400077245002900091250000600120260000900126500000600135650002700141210723s9999||||xx |||||||||||||| ||und||  aNULL  a23571  a621.381BSED  aSedov, E. 0aEntertaining Electronics  a-  a-b-  a0  aElectronic Engineering