TY  - BOOK
AU  - Riggs, James, L. Bedwerth, David, D. and Randhawa, Sabah, U 
TI  - Engineering economics 
SN  - 978-0-07-058670-3 
PY  - 2010///
CY  - Tata mcgraw hill company Ltd 
PB  - New Delhi 
KW  - MATHEMATICS
ER  -