TY  - GEN
AU  - De France J J
TI  - Electron tubes and semiconductors
AV  - TK7872.V3 
U1  - 621.384132  
PY  - 1958///
CY  - Englewood Cliffs, N.J.,  
PB  - Prentice-Hall,  
KW  - Electron tubes
KW  - Semiconductors
ER  -