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Ulrich's Periodicals Directory |
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Index Copernicus International |
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Scilit | ![]() |
CiteSeerX | ![]() |
DOAJ | ![]() |
SHERPA/RoMEO | ![]() |
China Knowledge Recource Integrated Database | ![]() |
NORWEGIAN REGISTER FOR SCIENTIFIC JOURNALS, SERIES AND PUBLISHERS | |
ERIH PLUS | ![]() |