Imboden, N. (1978). A management approach to project appraisal and evaluation: With special reference to non-directly productive projects. Development Centre of the Organisation for Economic Co-operation and Development ; sold by OECD Publications Center.

Imboden, N. A Management Approach to Project Appraisal and Evaluation: With Special Reference to Non-directly Productive Projects. Paris : Washington, D.C.: Development Centre of the Organisation for Economic Co-operation and Development ; sold by OECD Publications Center, 1978.

Imboden, N. A Management Approach to Project Appraisal and Evaluation: With Special Reference to Non-directly Productive Projects. Development Centre of the Organisation for Economic Co-operation and Development ; sold by OECD Publications Center, 1978.