TY  - BOOK
AU  - Siddiqui, M. A.
TI  - Introduction to geographical information systems
SN  - 81 86204 77 6
U1  - 910.285 
PY  - 2006///
CY  - Allahabad
PB  - Sharda Pustak Bhawan
KW  - Geographical information systems
ER  -