TY  - GEN
AU  - Ali, Wajahat (030360)
AU  - Rizwan Nazir Abbasi, Muhammad Umair Mufti
TI  - Smart pay phone system
U1  - 621 ALI-BEE 
PY  - 2007///
CY  - Islamabad.
PB  - Department of Electrical Engineering 
ER  -