00688nam a2200229 a 4500 73125 BD-RjUL 20211209082343.0 170603s1948 enka b 001 0 eng d (BD-RjUL)73343 DLC OT BD-RjUL eng eng 23 621.384 BEV 1948 Beck, A. H. W. (Arnold Hugh William), 1916- 216307 Velocity-modulated thermionic tubes / A. H. W. Beck Cambridge : University Press, c1948 x, 180 p. : ill. ; 22 cm. Modern radio technique Includes Bibliography and Index Vacuum-tubes. 216308 ddc BK 73125 73125 0 0 ddc 0 1 NFIC RUCL RUCL Reading 1969-11-13 Zeitlinger 21.60 0 621.384 BEV 1948 2017-06-03 00:00:00 C-1 2021-12-09 BK 0 0 ddc 0 0 NFIC RUCL RUCL Stack 1969-11-13 Zeitlinger 0 621.384 BEV 1948 2017-06-05 00:00:00 C-2 2017-06-05 BK