00674cam 2200217 450 2025461http://id.bnportugal.gov.pt/bib/porbase/202546120030428122800.00-07-034054-4Encadernado55230PTBN0016169419881205d1985 k y0pora0103 baengUSElectronic communication systemsGeorge Kennedy3rd edNew YorkMcGraw-Hillcop. 1985XXII, 741 p.il.23 cm621.39medfre291148KennedyGeorge204583PTBNRPCBPG 621.39coopUMSDmq252262bccoopUMSD47796/ENG0KEN 621.39 44226 SDcoopUTADBGmq3113438bccoopUTADBG0