(1972). Problems of environmental economics; record of the Seminar held at the OECD in summer 1971. [Paris]: Organisation for Economic Co-operation and Development.

Problems of Environmental Economics; Record of the Seminar Held At the OECD in Summer 1971. [Paris]: Organisation for Economic Co-operation and Development, 1972.

Problems of Environmental Economics; Record of the Seminar Held At the OECD in Summer 1971. [Paris]: Organisation for Economic Co-operation and Development, 1972.