Hilburn, John L. Manual of active filter design/ John L. Hilburn and David E. Johnson - New York: McGraw-Hill, c1973 - xii, 189 p.: ill.; 23 cm. ISBN: 0070287597 $ 12.50 Subjects--Topical Terms: Electric filtersElectronic circuit designElectronics--Graphic methods Dewey Class. No.: 621.381532