TY  - BOOK
AU  - Hansen,John R.
ED  - United Nations Industrial Development Organization
TI  - Guide to practical project appraisal: social benefit-cost analysis in developing countries 
T2  - Project formulation and evaluation series
PY  - 1978///
CY  - New York
PB  - United Nations
KW  - Economic development projects
KW  - Evaluation
N1  - At head of title: United Nations Industrial Development Organization, Vienna
ER  -