Scopus® (2,467,343)
MEDLINE (862,028)
Gale General OneFile (410,932)
Science Citation Index Expanded (371,165)
Complementary Index (336,332)
MathSciNet via EBSCOhost (297,921)
Academic Search Complete (277,230)
Gale Academic OneFile (271,529)
OAIster (212,348)
Supplemental Index (193,701)
Europeana (171,019)
Regional Business News (165,667)
Arts & Humanities Citation Index (164,349)
Social Sciences Citation Index (147,631)
IEEE Xplore Digital Library (127,761)
arXiv (82,742)
USPTO Patent Grants (76,914)
Springer Nature Journals (73,426)
Directory of Open Access Journals (64,930)
Business Source Complete (55,562)
China Online Journals (Wanfang) (55,351)
ScienceDirect (42,537)
Journals@OVID (30,438)
JSTOR Journals (23,217)
CINAHL Plus with Full Text (21,408)
SciTech Connect (18,619)
USPTO Patent Applications (17,093)
RePEc (16,263)
SwePub (14,555)
J-STAGE (12,220)
Education Source (11,986)
SpringerMaterials (11,599)
BrillOnline Reference Works (10,867)
Korea Citation Index (10,168)
DBPIA (6,357)
De Gruyter Online (6,201)
eScholarship (6,024)
Airiti Library eBooks & Journals - 華藝線上圖書館 (5,781)
British Library EThOS (5,018)
GOBI E-books (5,000)
Korean Studies Information Service System (4,490)
HeinOnline (4,456)
KERIS Theses & Dissertations (4,377)
NASA Technical Reports (4,199)
ERIC (3,982)
Oxford Reference (3,768)
Academic Conferences in China (Wanfang) (3,663)
Library, Information Science & Technology Abstracts (3,336)
ProjectMUSE (3,117)
ACM Full-Text Collection (2,861)
Communication & Mass Media Complete (2,458)
ClinicalTrials.gov (2,177)
MLA International Bibliography (1,916)
RISS - DDOD (Digital Dissertations On Demand) (1,910)
SciELO (1,858)
BioOne Complete (1,477)
스콜라(Scholar) (1,408)
GeoScienceWorld (1,397)
Artstor Digital Library - International Edition (1,206)
eArticle (1,187)
Emerald Insight (1,037)
TDX (889)
Research Starters (829)
Westlaw UK (776)
Wiley Online Reference Works (676)
ASTM Compass (623)
Persée (564)
APA PsycArticles (526)
Newswires (486)
Oxford Scholarship Online (470)
Digital Access to Scholarship at Harvard (DASH) (453)
Aerospace Research Central (384)
Alexander Street (356)
Accessible Archives (349)
ASM Medical Materials Database (336)
ASM Alloy Center Database (279)
SpringerProtocols (259)
ChemSpider (172)
University Press Scholarship Online (144)
SveMed+ (118)
Naxos Music Library (117)
AccessScience (104)
AccessEngineering (99)
JoVE Journal (97)
ERICdata Higher Education Knowledge (90)
Oxford Medicine Online (82)
Choice Reviews (58)
JoVE Science Education Database (57)
F1000Research (56)
SSOAR – Social Science Open Access Repository (52)
Wiley Digital Archives (51)
McGraw-Hill Medical (40)
Cochrane Database of Systematic Reviews (35)
Oxford Art Online (33)
Britannica Online (33)
Canadiana Online (32)
Grove Music Online (31)
KRpia (28)
JoVE Core (27)
Economist Historical Archive (27)
E-LIS (Eprints in Library & Information Science) (26)
CogPrints (23)
OAPEN Library (21)
ASM Micrograph Database (13)
European Union Open Data Portal (11)
Oxford Clinical Psychology (11)
JoVE Lab Manual (10)
OECD iLibrary (10)
ICPSR Data Archive (6)
BMJ Best Practice US (6)
MLA Directory of Periodicals (4)
BrillOnline Primary Source (4)
JoVE Encyclopedia of Experiments (4)
ASM Failure Analysis Database (2)
SMART Imagebase (1)