Scopus® (51,331)
MEDLINE (17,715)
Gale General OneFile (14,131)
OAIster (13,084)
Europeana (5,704)
Science Citation Index Expanded (5,594)
Academic Search Complete (4,322)
Complementary Index (3,739)
Directory of Open Access Journals (2,961)
MathSciNet via EBSCOhost (2,948)
Gale Academic OneFile (2,830)
Springer Nature Journals (1,787)
Supplemental Index (1,784)
ScienceDirect (1,426)
IEEE Xplore Digital Library (1,402)
GOBI E-books (825)
ProjectMUSE (564)
Journals@OVID (478)
Business Source Complete (459)
Regional Business News (414)
MLA International Bibliography (378)
China Online Journals (Wanfang) (356)
TDX (332)
RePEc (322)
arXiv (305)
SwePub (296)
JSTOR Journals (276)
Naxos Music Library (249)
BrillOnline Reference Works (185)
Alexander Street (179)
USPTO Patent Grants (154)
Social Sciences Citation Index (133)
Airiti Library eBooks & Journals - 華藝線上圖書館 (112)
Education Source (110)
Communication & Mass Media Complete (105)
Cochrane Database of Systematic Reviews (103)
De Gruyter Online (92)
Korea Citation Index (87)
eScholarship (74)
CINAHL Plus with Full Text (70)
J-STAGE (70)
Arts & Humanities Citation Index (48)
eArticle (44)
Korean Studies Information Service System (41)
USPTO Patent Applications (41)
KERIS Theses & Dissertations (40)
Wiley Online Reference Works (29)
Persée (29)
NASA Technical Reports (27)
DBPIA (24)
SciTech Connect (24)
Library, Information Science & Technology Abstracts (24)
ACM Full-Text Collection (22)
British Library EThOS (19)
BioOne Complete (16)
Research Starters (14)
Artstor Digital Library - International Edition (14)
RISS - DDOD (Digital Dissertations On Demand) (11)
ERIC (9)
University Press Scholarship Online (9)
Digital Access to Scholarship at Harvard (DASH) (8)
SciELO (8)
SSOAR – Social Science Open Access Repository (7)
Emerald Insight (6)
Academic Conferences in China (Wanfang) (4)
ClinicalTrials.gov (4)
스콜라(Scholar) (4)
ASTM Compass (3)
E-LIS (Eprints in Library & Information Science) (3)
APA PsycArticles (3)
SpringerProtocols (2)
ASM Medical Materials Database (2)
Oxford Medicine Online (2)
GeoScienceWorld (2)
Grove Music Online (2)
Newswires (2)
SMART Imagebase (2)
ERICdata Higher Education Knowledge (2)
Oxford Scholarship Online (1)
HeinOnline (1)
Aerospace Research Central (1)
SpringerMaterials (1)
Accessible Archives (1)
JoVE Journal (1)
OAPEN Library (1)