000 00321n a2200133ua 4500
040 _aP K Kelkar Library, IIT Kanpur
082 _a621.38151
_bP539
100 _aPhilips
245 0 _aElectron tubes
_cPhilips
260 _a
_b
_c1965
300 _avarious pagings
650 _aElectron Tube
997 _aA917 s C
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