000 00486nam a22001697a 4500
003 BD-DhUAAB
005 20201005140000.0
008 201005b xxu||||| |||| 00| 0 eng d
040 _aBD-DhUAAB
_cBD-DhUAAB
082 _223
_a621.381512
_bB E T
100 _aBECK, A. H. W.
245 _aTHERMIONIC VALVES : THEIR THEORY AND DESIGN
_cA. H. W. BECK
260 _aNew york:
_bAT THE UNIVERSITY PRESS,
_c1953
300 _a570 P.:
_c22 SM.
650 _xTHERMIONIC VALVES
942 _2ddc
_cBK
999 _c2258
_d2258