TY  - GEN
AU  - Hansen, John R
TI  - Guide to practical project appraisal: social benefit-cost analysis in developing countries
T2  - United Nations Industrial Development Organization, Project Formulation and Evaluation Series, no.3
U1  - 658.1554 
PY  - 1978///
CY  - New Delhi
PB  - Oxford & IBH
KW  - Management
ER  -