Calculator and chart for feedback problems :
Felker, J. H.
Calculator and chart for feedback problems : - - New York BTL 1950 - 3 - IGE Comm No. - 880 : 1972 .
621.39
Calculator and chart for feedback problems : - - New York BTL 1950 - 3 - IGE Comm No. - 880 : 1972 .
621.39