TY  - BOOK
ED  - THE INSTITUTION OF ELECTRICAL ENGINEERING
TI  - Electronics Letters, Vol. 27, Apr-Jun 1991
U1  - 621.381 
PY  - 1991///
CY  - LONDON
PB  - THE INSTITUTION OF ELECTRICAL AND ELECTRONICS ENGINEERS
KW  -  ELECTRONICS AND COMMUNICATION ENGINEERING
KW  - ELECTRONICS LETTERS
ER  -