@book{ Solr-93447, title = {Einführung in die Theorie der Hochfrequenz Bandfilter}, series = {Monographien der elektrischen Nachrichtentechnik ;}, author = {Feldtkeller, R.}, editor = {Feldtkeller, R.}, address = {Stuttgart}, publisher = {Hirzel}, year = {1961}, edition = {5. Aufl.}, note = {deutsch}, }