Scopus® (232,504)
MEDLINE (123,579)
OAIster (61,653)
Academic Search Complete (44,949)
Science Citation Index Expanded (36,025)
Europeana (24,813)
MathSciNet via EBSCOhost (22,618)
ScienceDirect (22,135)
Springer Nature Journals (20,533)
Complementary Index (19,556)
Supplemental Index (13,027)
Directory of Open Access Journals (8,941)
JSTOR Journals (7,923)
IEEE Xplore Digital Library (7,753)
Gale Academic OneFile (7,207)
Journals@OVID (6,322)
arXiv (4,871)
Naxos Music Library (4,624)
BrillOnline Reference Works (4,303)
SwePub (3,771)
Gale General OneFile (2,234)
Business Source Complete (1,479)
China Online Journals (Wanfang) (1,364)
eScholarship (1,202)
Social Sciences Citation Index (1,032)
De Gruyter Online (977)
Alexander Street (926)
MLA International Bibliography (829)
RePEc (794)
Westlaw UK (669)
Persée (643)
USPTO Patent Grants (635)
Artstor on JSTOR (For institutions outside of the US) (630)
Arts & Humanities Citation Index (558)
SciTech Connect (528)
HeinOnline (526)
SpringerMaterials (455)
Education Source (263)
J-STAGE (229)
KERIS Theses & Dissertations (227)
NASA Technical Reports (226)
DBPIA (222)
GOBI E-books (193)
Regional Business News (191)
ACM Full-Text Collection (189)
USPTO Patent Applications (187)
Korea Citation Index (145)
Airiti Library eBooks & Journals - 華藝線上圖書館 (135)
BioOne Complete (134)
British Library EThOS (124)
TDX (112)
Research Starters (103)
Communication & Mass Media Complete (103)
CINAHL Plus with Full Text (100)
ClinicalTrials.gov (95)
스콜라(Scholar) (89)
Digital Access to Scholarship at Harvard (DASH) (82)
Oxford Art Online (79)
SciELO (76)
GeoScienceWorld (69)
Wiley Online Reference Works (63)
ProjectMUSE (61)
Library, Information Science & Technology Abstracts (60)
RISS - DDOD (Digital Dissertations On Demand) (59)
eArticle (52)
Grove Music Online (52)
ASTM Compass (44)
Korean Studies Information Service System (43)
Emerald Insight (37)
ERIC (34)
Oxford Scholarship Online (29)
Cochrane Database of Systematic Reviews (15)
Aerospace Research Central (15)
Oxford Reference (15)
Academic Conferences in China (Wanfang) (13)
OAPEN Library (12)
APA PsycArticles (10)
European Union Open Data Portal (9)
JoVE Journal (7)
E-LIS (Eprints in Library & Information Science) (5)
Britannica Online (4)
BrillOnline Primary Source (3)
MLA Directory of Periodicals (3)
SSOAR – Social Science Open Access Repository (2)
Wiley Digital Archives (2)
F1000Research (2)
Newswires (2)
BMJ Best Practice US (1)
ASM Medical Materials Database (1)
ChemSpider (1)
AccessScience (1)
Choice Reviews (1)
Oxford Medicine Online (1)
University Press Scholarship Online (1)