United Nations. (1978). Guide to practical project appraisal: Social benefit - cost analysis in developing countries. Oxford & IOH Publishing Company.
Styl cytowania ChicagoUnited Nations. Guide to Practical Project Appraisal: Social Benefit - Cost Analysis in Developing Countries. New Delhi: Oxford & IOH Publishing Company, 1978.
Styl cytowania MLAUnited Nations. Guide to Practical Project Appraisal: Social Benefit - Cost Analysis in Developing Countries. Oxford & IOH Publishing Company, 1978.
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