TY  - BOOK
AU  - Riggs, James L.
AU  - West, Thomas M.
TI  - Essentials of Engineering Economics 
SN  - 0070528721
U1  - 658.1596 
PY  - 1986///
CY  - New York : 
PB  - McGraw-Hill, 
KW  - Engineering Economy
N1  - YY
UR  - https://eaklibrary.neduet.edu.pk:8443/catalog/bk/books/toc/0-07-052872-1.pdf
ER  -