TY  - BOOK
AU  - Gowar ,John6980
TI  - Optical communication systems /2nd ed
SN  - 8120308344
U1  - 621.39:654.91 
PY  - 1996///
CY  - New Delhi
PB  - Prentice-Hall of India
KW  - 621.39:654.91
ER  -