TY  - BOOK
AU  - Wirshing, James R.
AU  - Wirshing, Roy H
TI  - Schaum's outline of theory and problems of introductory surveying
SN  - 0070588848
U1  - 624.11 
PY  - 2004///
CY  - New Delhi
PB  - Tata McGraw Hill Pub. Co. Ltd.
ER  -