TY  - BOOK
AU  - Arain, Ghulam Shabbir.
AU  - Chachar, Ghulam Akbar.
TI  - Signalling and interlocking systems
PY  - 1983///
CY  - MUET, Jamshoro
PB  - Civil Engineering
KW  - Civil Engineering
N1  - Includes References
ER  -