Skwirzynski, J. K. Design theory and data for electrical filters [by] J. K. Skwirzynski. - London, New York, Van Nostrand, 1965. - xxviii, 701p. illus. 24cm. - The Marconi series, covering advances in radio and radar . LCCN: 65011072 Subjects--Topical Terms: FILTROS ELÉCTRICOS Dewey Class. No.: 621.31921