Bergmann, H., & Boussard, J. (1976). Guide to the economic evaluation of irrigation projects (Rev. ver.). Organisation for Economic Co-operation and Development ; sold by OECD Publications Center].

Bergmann, Hellmuth, and Jean-Marc Boussard. Guide to the Economic Evaluation of Irrigation Projects. Rev. ver. Paris : [Washington, D.C.: Organisation for Economic Co-operation and Development ; sold by OECD Publications Center], 1976.

Bergmann, Hellmuth, and Jean-Marc Boussard. Guide to the Economic Evaluation of Irrigation Projects. Rev. ver. Organisation for Economic Co-operation and Development ; sold by OECD Publications Center], 1976.