na YOGYA-02090000019142 20090227022939.0 ind 010-020900000019142 621.3841 621.3841 Scr F Scroggie, M.G Foundation of Wireless M.G. Scroggie London Wireless World 1958 ix, 388 hlm ilus 22 cm Index Wireless YOPDYOGB 06-03-06 1 PKL-ATM a000006620