TY  - BOOK
AU  - Selvi,A.Mury Thiruvalar
TI  - Map elements and topographic map interpretation
U1  - 369.43 
PY  - 2009///
CY  - Chennai
PB  - Thirukkural Pathippagam
KW  - Topographic maps
KW  - Geographic information systems
KW  - Maps
ER  -