000
00306pam a2200133a 44500
082
_a
621.38151
_b
C497o
100
_a
Cisin, Harry George
245
1
_a
OVER 11,000 DIRECT TUBE SUBSTITUTES
260
_a
N. Y.
_b
_c
1963
300
_a
73
650
_a
Electron Tubes
964
_g
CIRC
997
_a
54658 C
999
_c
413915
_d
413915