Guide to practical project appraisal : social benefit-cost analysis in developing countries /
- New York : United Nations, 1978.
- viii, 121 p. : ill. ; 24 cm.
- [Document - United Nations] ; ID/SER.H/3 .
"Written by John R. Hansen." At head of title: United Nations Industrial Development Organization, Vienna. "United Nations publication. Sales no. E.78.II.B.3." Includes index.