000
00232 a2200109 4500
082
_a
621.384
_b
W743r
245
1
_a
RADIO VALVE DATA
260
_a
London
_b
Iliffe Books
_c
1961
300
_a
156
964
_g
CIRC
997
_a
16215 s C
999
_c
452717
_d
452717