00454nam a22001577a 4500 NUST - PNEC 20170116181028.0 150918b xxu||||| |||| 00| 0 eng d LIBRARY 621.387 BOY 10934 Boyce Charles Frederick Open-wire carrier telephone transmission Charles Frederick Boyce 1962 10935 Telephone lines--Design and construction EL ddc BK 67636 67636 0 0 ddc 0 0 PNEC PNEC WING-B 0000-00-00 0 621.387 BOY PNECLIB-001199 2015-09-18 0000-00-00 BK