00255nam a22000977a 4500003000600000005001700006008004100023040000700064245004700071260003900118DE-3120190521143345.0190521b           ||||| |||| 00| 0 ger d  ccg  aStröme Felder ElektronencHelmut Lindner  aKölnbAulis Verlag Deubnerc1971