Centre for Educational Research and Innovation. (1978). Pre-school education: Report from five research projects. Organisation for Economic Co-operation and Development ; sold by OECD Publications Center].

Centre for Educational Research and Innovation. Pre-school Education: Report from Five Research Projects. Paris : [Washington, D.C.: Organisation for Economic Co-operation and Development ; sold by OECD Publications Center], 1978.

Centre for Educational Research and Innovation. Pre-school Education: Report from Five Research Projects. Organisation for Economic Co-operation and Development ; sold by OECD Publications Center], 1978.