TY  - BOOK
AU  - Gupta,K.K.
AU  - Tyagi,V.C
TI  - Working with maps:  a book for senior secondary level. 
U1  - 526 
PY  - 1992///
CY  - [s.l.]
PB  - 105(DLZ) Printing Group
KW  - Mathematical geography -
N1  - Includes appendix
ER  -