Sammons, Pam;  Sylva, Kathy;  Melhuish, Edward;  Taggart, Brenda;  Elliot, Karen;  Siraj-Blatchford, Iram;         (2002)    The Effective Provision of Pre-School Education (EPPE) Project: Measuring the impact of pre-school on children's cognitive progress over the pre-school period.                    Institute of Education, University of London/ Department for Education and Skills: London.       Green open access