00607cam a2200181u 4500 621.381512 MID L-11, P-33. Middleton, Herman Arnold. [from old catalog] 42197 Receiving tube substitution guide book. New York, J. F. Rider [1950] 343 p. illus. 28 cm. 0 0 0 621_381512000000000_MID 0 0 0 621_381512000000000_MID 0 0 0 621_381512000000000_MID MCE 379 Television Picture tubes. [from old catalog] 42198 Vacuum-tubes. ddc BK 546127 546127 0 0 ddc 0 0 MCE MCE 2014-06-03 0 621.381512 MID MCE-810 2014-06-03 2021-03-14 BK Suplement 0 0 ddc 0 0 MCE MCE 2014-06-03 0 621.381512 MID MCE-33448 2014-06-03 2021-03-14 BK Suplement 0 0 ddc 0 0 MCE MCE 2014-06-03 0 621.381512 MID MCE-809 2014-06-03 2021-03-14 BK Suplement