Dangos 1 - 1 canlyniadau o 1 ar gyfer chwilio 'Educational Research and Development Center (Yemen)', amser ymholiad: 0.02e Mireinio'r Canlyniadau
  1. 1
    Improving the Efficiency of Educational Systems Project. : indicators of educational effectiveness and efficiency /
    gan Windham, Doughlas M.
    Cyhoeddwyd 1990
    "August 1984-1994."
    “...Educational Research and Development Center (Yemen)...”
    Llyfr
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