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1- Google Scholar | |||
2- ERIC | |||
3- The Virtual LRC | |||
4- z-lib.org | |||
5- JURN | |||
6- Microsoft Academic | |||
7- Library of Congress | |||
8- Cite SeerX | |||
9- Refseek | |||
10- Science Direct | |||
11- free-ebooks.net | |||
12- manybooks.net |
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1- Google Scholar | |||
2- ERIC | |||
3- The Virtual LRC | |||
4- z-lib.org | |||
5- JURN | |||
6- Microsoft Academic | |||
7- Library of Congress | |||
8- Cite SeerX | |||
9- Refseek | |||
10- Science Direct | |||
11- free-ebooks.net | |||
12- manybooks.net |
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