TY  - BOOK
AU  - Irvin, George
TI  - Modern cost benefit methods : an introduction to  financial, economic and social appraisal of  development projects
SN  - 0333232089
U1  - 658.1554 
PY  - 1978///
CY  - London
PB  - Macmillan
N1  - Bibliography : p.240-248
ER  -