000
002790000a22001210004500
245
_a
Electron tubes and semicondustors
100
_a
DeFrance, J.J.
260
_a
New Jersey
_b
Prentice Hall
_c
1958
300
_a
254 p.
080
_a
621.382
_b
D4
041
_a
EN
942
_c
BK
999
_c
52729
_d
52729