TY  - BOOK
AU  - Gray,Bernard Francis
TI  - Electronics level 1: systems and practice 
T2  - Longman technician series
SN  - 0582411319
PY  - 1977///
CY  - London ; , New York : 
PB  - Longman, 
KW  - Electronic apparatus and appliances
KW  - Electronics
N1  - Includes index
ER  -