TY  - GEN
AU  - WARD, W . A
AU  - DEREN, B . J & SILVA , E . H
TI  - The Economics of Project Analysis: A practitioner's Guide,
SN  - 0-8213-1751-2
U1  - 338.9 WAR 
PY  - 1991///
CY  - New York
PB  - USA
ER  -