ADEL S. FILTER THEORY AND DESIGN: ACTIVE AND PASSIVE - LONDON PITMAN 1978 - 785 1 1 0 0 ISBN: 0 273 01429 3 Source: 1984-943 Subjects--Personal Names: PETER O. BRACKETT Subjects--Topical Terms: TECHNOLOGY(APPLIED SCIENCES) LC Class. No.: TK 7872 .F5S42