|
BASE (Bielefeld Academic Search Engine) |
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CORE |
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ERIC: Institute of Education Sciences |
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Google Scholar |
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Infotopia |
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Microsoft Academic |
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Refseek |
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ResearchGate |
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Scinapse |
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Scince.gov |
|
Semantic Scholar |
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Word Wide Science |
|
ScienceGate |
|
Sweet Search: A Search Engine for Students |