Scopus® (82,096)
MEDLINE (50,925)
Science Citation Index Expanded (15,398)
Complementary Index (5,953)
Academic Search Complete (4,340)
Directory of Open Access Journals (4,003)
Supplemental Index (3,234)
ScienceDirect (2,394)
Springer Nature Journals (2,250)
IEEE Xplore Digital Library (2,075)
arXiv (1,802)
SwePub (1,631)
CINAHL Plus with Full Text (1,160)
Gale Academic OneFile (966)
Journals@OVID (882)
Gale General OneFile (544)
eScholarship (509)
Social Sciences Citation Index (478)
Korean Studies Information Service System (364)
MathSciNet via EBSCOhost (312)
RePEc (220)
DBPIA (216)
JSTOR Journals (200)
Business Source Complete (173)
NASA Technical Reports (168)
J-STAGE (137)
USPTO Patent Grants (96)
Digital Access to Scholarship at Harvard (DASH) (78)
USPTO Patent Applications (70)
Korea Citation Index (68)
HeinOnline (59)
Education Source (53)
ACM Full-Text Collection (40)
Airiti Library eBooks & Journals - 華藝線上圖書館 (37)
China Online Journals (Wanfang) (33)
Europeana (28)
KERIS Theses & Dissertations (26)
스콜라(Scholar) (23)
De Gruyter Online (21)
Arts & Humanities Citation Index (20)
eArticle (18)
Library, Information Science & Technology Abstracts (17)
ERIC (16)
BioOne Complete (13)
Academic Conferences in China (Wanfang) (12)
GeoScienceWorld (12)
Communication & Mass Media Complete (10)
SciTech Connect (9)
British Library EThOS (5)
Emerald Insight (5)
Regional Business News (5)
Wiley Online Reference Works (4)
Cochrane Database of Systematic Reviews (4)
GOBI E-books (4)
Oxford Art Online (3)
SciELO (3)
APA PsycArticles (3)
OAIster (2)
Aerospace Research Central (2)
MLA International Bibliography (2)
Alexander Street (2)
ProjectMUSE (2)
JoVE Journal (2)
SSOAR – Social Science Open Access Repository (2)
ASTM Compass (2)
Oxford Scholarship Online (2)