00671nam a2200229 a 4500 73212 BD-RjUL 20211209082349.0 170529r19531950enka 001 0 eng d (BD-RjUL)73430 DLC CarP BD-RjUL eng eng 621.38 RET 1953 23 Renton, R. N. (Robert Norman) 42828 Telecommunications principles / R. N. Renton London : Sir Isaac Pitman & Sons, c1950 [reprinted 1953] xiii, 450 p. : ill. ; 25 cm. Includes index. Telecommunication 42829 ddc BK 73212 73212 0 0 ddc 0 1 NFIC RUCL RUCL Reading 1955-04-19 Paramount book 23.70 0 621.38 RET 1953 2017-05-29 00:00:00 C-1 2017-05-29 BK