Content Provider
AAAS Resource Center (American Association for the Advancement of Science - via Crossref)
25
AAAS Resource Center (American Association for the Advancement of Science)
29
ACM Publications (Association for Computing Machinery - via Crossref)
1
ACM Publications (Association for Computing Machinery)
1
ACS Publications
43
ACS Publications (via Crossref)
13
ADDI: Repositorio Institucional de la Universidad del País Vasco (UPV)
2
ADORA - Oslo School of Architecture and Design
1
AFTI Scholar (Air Force Institute of Technology)
5
AIP Publishing
44
AIP Publishing (via Crossref)
1
AJOL - African Journals Online
2
AMUR - Adam Mickiewicz University Repository, Poznan
5
ARCIMÍS (Archivo Climatológico y Meteorológico Institucional - AEMET, Agencia Estatal de Meteorología)
8
ARPI - Archivio della Ricerca dell'Università di Pisa
43
ARUd'A - Archivio Istituzionale della ricerca dell'università Chieti-Pescara (IRIS)
5
ASCE Publications (American Society of Civil Engineers)
50
ASCE Publications (via Crossref)
9
ASIA University, Taiwan: Instiutional Repository (ASIAIR)
2
ASM Journals (American Society for Microbiology - via Crossref)
33
ASM Journals (American Society for Microbiology)
37
ATE Central Resource Collection (Advanced Technological Education)
1
Aalborg University's Research Portal
3
Aalto University Publication Archive (Aaltodoc)
8
Aarhus University: OJS at The State and University Library
9
Aarhus University: Research
180
Aberdeen University Research Archive (AURA)
17
Academy of Science of South Africa (ASSAf): Open Journal Systems
1
Acta Fytotechnica et Zootechnica Online (Faculty of Agrobiology and Food Sciences, Slovak University of Agriculture in Nitra)
1
Adam Mickiewicz University in Poznań: PRESSto
2
Advances in Geo-Energy Research (E-Journal)
1
AgEcon Search - Research in Agricultural & Applied Economics
1
Agrarian History (E-Journal)
1
AgroParisTech: HAL (Institut des sciences et industries du vivant et de l'environnement)
20
AgroSpace - Faculty of Agriculture, University of Belgrade
1
Agrocampus Ouest: HAL
1
Aix-Marseille Université: HAL
75
Akademicka Platforma Czasopism
7
Akademicka Platforma Czasopism (APCZ)
7
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center)
2,014
Altai State University: Scientific Journals of ASU
12
American Scientific Publishers
2
American Scientific Research Journal for Engineering, Technology, and Sciences (ASRJETS)
2
Anadolu University Institutional Repository
1
Anagrafe della Ricerca d'Ateneo (Universitá degli studi Roma Tre)
2
Ankara University Open Archive System
1
Apollo - University of Cambridge Repository
49
ArXiv.org (Cornell University Library)
34
Arca (BC's Digital Treasures)
29
Arcadia - Explorations in Environmental History (E-Journal)
1
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