00570nam a2200205Ia 4500 34337 BIBL 20160527195049.0 900328 a 0 0 eng d 55007924 Catalog Card Corp EVLG 621.384 R544 c1 621.38 621.38 R544 Rider, John F. 269426 Local Basic vacuum tubes and their uses by John F. Rider and Henry Jacobowitz. Rider 1955. 204p illus. Vacuum tubes sears 286848 Local 25682 25682 0 0 0 621_380000000000000_R544 0 evl 259319 10 10 1 2016-05-27 47570 0 621.38 R544 80000000714421 2016-05-27 00:00:00 r:34337 z:NCC:D 6