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040 _aGURUDAS COLLEGE LIBRARY
082 _a537.5
_bALD ed.7
100 _aAldous, W. H.
245 1 0 _aThermionic vacuum tubes and their applications
_cW.H. Aldous and Edward Appleton
250 _a7th ed
260 _aLondon
_bMethuen
_c1958, r1961
300 _avi, 162 p.
650 _aELECTRONICS
700 _aAppliton, Edward
942 _cBOOK
999 _c6922
_d6922