000 00306pam a2200133a 44500
082 _a621.38151
_bM451c
100 _aMay, Walter J.
245 1 _aCOMPREHENSIVE RADIO VALVE GUIDE
260 _aLondon
_bBernards
_c1963-
300 _a1v.
650 _aVacuum Tubes
964 _gCIRC
997 _a30472 C
999 _c442585
_d442585