00301nam a2200121Ia 4500008004100000020000500041082002500046100001800071245003900089260003800128300000800166650000500174140316s9999    xx            000 0 und d  a  a621.38132 03bGRA/EN  aGraf,Rudolf F  aEncyclopedia of eletronic circuits  aNew DelhibBPB Publicationsc1989  a760  a