Scopus® (180,322)
MEDLINE (89,039)
Science Citation Index Expanded (25,969)
Complementary Index (9,428)
Academic Search Complete (7,806)
Supplemental Index (5,103)
IEEE Xplore Digital Library (4,271)
ScienceDirect (4,218)
Directory of Open Access Journals (3,979)
Springer Nature Journals (3,504)
arXiv (2,955)
CINAHL Plus with Full Text (2,068)
SwePub (1,970)
Gale Academic OneFile (1,778)
Journals@OVID (1,594)
eScholarship (1,404)
Europeana (705)
Social Sciences Citation Index (675)
Gale General OneFile (574)
MathSciNet via EBSCOhost (379)
Korean Studies Information Service System (348)
JSTOR Journals (348)
RePEc (339)
Business Source Complete (322)
NASA Technical Reports (283)
DBPIA (166)
Digital Access to Scholarship at Harvard (DASH) (160)
USPTO Patent Grants (146)
USPTO Patent Applications (109)
Education Source (105)
Korea Citation Index (93)
J-STAGE (59)
China Online Journals (Wanfang) (57)
eArticle (49)
De Gruyter Online (44)
스콜라(Scholar) (40)
Airiti Library eBooks & Journals - 華藝線上圖書館 (31)
ACM Full-Text Collection (31)
BioOne Complete (28)
GeoScienceWorld (24)
ERIC (18)
APA PsycArticles (13)
KERIS Theses & Dissertations (12)
ASTM Compass (11)
SciELO (10)
Communication & Mass Media Complete (10)
Arts & Humanities Citation Index (10)
SciTech Connect (9)
Emerald Insight (8)
Library, Information Science & Technology Abstracts (8)
Wiley Online Reference Works (7)
HeinOnline (6)
Aerospace Research Central (5)
Academic Conferences in China (Wanfang) (5)
ProjectMUSE (4)
JoVE Journal (4)
Persée (3)
OAIster (2)
MLA International Bibliography (2)
SveMed+ (2)
British Library EThOS (2)
Oxford Medicine Online (2)
Oxford Scholarship Online (1)
GOBI E-books (1)
Regional Business News (1)
ASM Medical Materials Database (1)
SSOAR – Social Science Open Access Repository (1)
ClinicalTrials.gov (1)
Alexander Street (1)