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S darčekovým poukazom nešliapnete vedľa. Obdarovaný si za darčekový poukaz môže vybrať čokoľvek z našej ponuky.
30 dní na vrátenie tovaru
Involved in instructional technology for almost 40 years, M. David Merrill's contributions range from basic instructional principles and instructional design theory to development and implementation of learning environments. These essays have been written by those who have worked with and been inspired by him.