MEDLINE (275,832)
Scopus® (133,786)
Science Citation Index Expanded (34,065)
Complementary Index (8,224)
ScienceDirect (6,826)
Academic Search Complete (6,699)
CINAHL Plus with Full Text (5,076)
Supplemental Index (4,598)
Directory of Open Access Journals (3,918)
SwePub (3,492)
IEEE Xplore Digital Library (3,015)
Springer Nature Journals (2,943)
eScholarship (2,787)
arXiv (2,315)
Gale Academic OneFile (1,426)
Social Sciences Citation Index (1,321)
Journals@OVID (1,264)
MathSciNet via EBSCOhost (839)
Gale General OneFile (420)
RePEc (277)
Business Source Complete (266)
JSTOR Journals (236)
ERIC (226)
ASTM Compass (225)
NASA Technical Reports (182)
Education Source (155)
SciTech Connect (147)
USPTO Patent Grants (112)
Digital Access to Scholarship at Harvard (DASH) (99)
USPTO Patent Applications (83)
Europeana (65)
China Online Journals (Wanfang) (57)
ACM Full-Text Collection (55)
J-STAGE (53)
DBPIA (42)
Arts & Humanities Citation Index (40)
De Gruyter Online (32)
Korea Citation Index (31)
BioOne Complete (28)
SciELO (23)
Airiti Library eBooks & Journals - 華藝線上圖書館 (23)
GeoScienceWorld (17)
Korean Studies Information Service System (16)
Communication & Mass Media Complete (15)
Aerospace Research Central (14)
Library, Information Science & Technology Abstracts (12)
APA PsycArticles (10)
HeinOnline (10)
OAIster (9)
British Library EThOS (8)
eArticle (7)
MLA International Bibliography (6)
GOBI E-books (6)
BMJ Best Practice US (5)
F1000Research (5)
Academic Conferences in China (Wanfang) (4)
Wiley Online Reference Works (4)
KERIS Theses & Dissertations (4)
Emerald Insight (3)
SveMed+ (3)
Naxos Music Library (3)
Alexander Street (3)
Oxford Scholarship Online (2)
JoVE Journal (2)
Cochrane Database of Systematic Reviews (2)
Regional Business News (1)
Research Starters (1)
Wiley Digital Archives (1)
ClinicalTrials.gov (1)
스콜라(Scholar) (1)
ProjectMUSE (1)
McGraw-Hill Medical (1)