TY  - GEN
AU  - Gray,Bernard Francis
TI  - Electronics 1: systems and practice 
T2  - Longman technician series
SN  - 0582411319 (pbk.)
AV  - TK7815 .G698
U1  - 621.381 
PY  - 1980///
CY  - London
PB  - Longman, 
KW  - Electronics
KW  - Telecommunication.
N1  - Includes index
ER  -