Scopus® (43,507)
MEDLINE (24,932)
Science Citation Index Expanded (6,565)
Complementary Index (1,932)
Academic Search Complete (1,603)
Directory of Open Access Journals (1,472)
arXiv (1,265)
Springer Nature Journals (1,230)
Supplemental Index (1,062)
ScienceDirect (1,006)
IEEE Xplore Digital Library (1,001)
SwePub (729)
CINAHL Plus with Full Text (437)
Gale Academic OneFile (418)
Journals@OVID (349)
eScholarship (215)
Social Sciences Citation Index (152)
Gale General OneFile (142)
JSTOR Journals (81)
MathSciNet via EBSCOhost (72)
Digital Access to Scholarship at Harvard (DASH) (66)
NASA Technical Reports (65)
RePEc (63)
Business Source Complete (55)
De Gruyter Online (28)
USPTO Patent Applications (26)
China Online Journals (Wanfang) (26)
Education Source (23)
USPTO Patent Grants (20)
Korea Citation Index (13)
Europeana (13)
BioOne Complete (8)
GeoScienceWorld (8)
J-STAGE (8)
Wiley Online Reference Works (7)
ERIC (6)
Airiti Library eBooks & Journals - 華藝線上圖書館 (6)
SciELO (5)
APA PsycArticles (5)
DBPIA (4)
Arts & Humanities Citation Index (3)
Library, Information Science & Technology Abstracts (3)
Academic Conferences in China (Wanfang) (3)
SveMed+ (2)
GOBI E-books (2)
eArticle (2)
Korean Studies Information Service System (1)
ASM Medical Materials Database (1)
Oxford Scholarship Online (1)
ASTM Compass (1)
Communication & Mass Media Complete (1)
Aerospace Research Central (1)
ACM Full-Text Collection (1)
SciTech Connect (1)
ProjectMUSE (1)
JoVE Journal (1)
Emerald Insight (1)
HeinOnline (1)