TY - BOOK TI - PISA 2009 results : students on line. Volume VI, Digital technologies and performance CY - Paris PB - Organisation for Economic Co-operation and Development PY - 2011 LA - English SN - 978-92-64-11291-9 N1 - Pod názvem: Programme for International Student Assessment UR - http://dx.doi.org/10.1787/9789264112995-en ER -