= Clark, Ruth Colvin 1 ![.](/images/dot-cl.gif) ![Title List](/images/title-list-catalog-en.png) 1 1![.](/images/dot-cl.gif)
| [книга] |
| E-Learning and the Science of Instruction |
| |
| San Francisco : Pfeiffer |
| 2003 |
ISBN: | 0-7879-6051-9 |
| |
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Bulgarian version
 
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