TY  - BOOK
AU  - Narejo, Ghous Bakhsh.
AU  - M. D. Makhdoom 
TI  - Study of international gateway exchange-3 karachi
PY  - 1990///
CY  - MUET, Jamshoro
PB  - Electronic Engineering, IICT
KW  - Electronic Engineering
N1  - Includes References
ER  -