mendeley.com
Reference Manager helps search books, ebooks, papers, library records, or reading archives.
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regulyarchivum.hu
Digital archive of the Antal Reguly.
reitaku.repo.nii.ac.jp
Browse digitized texts, images, archives and cataloged cultural materials.
rtabstracts.org
Research index for locating articles, books, authors and citation information.
gitlab.com
Renewedtab is an open source browser tool for improving tabs, bookmarks, extensions, or browsing workflows.
repair.wiki
RepairWiki helps search books, ebooks, papers, library records, or reading archives.
repec.org
RePEc helps search books, ebooks, papers, library records, or reading archives.
bibliotecadigital.unicamp.br
Find digitized publications and collection items through an online library.
kitakyu.repo.nii.ac.jp
Find digitized publications and collection items through an online library.
myanonamouse.net
Requires Invite helps search books, ebooks, papers, library records, or reading archives.
recercat.cat
Find digitized publications and collection items through an online library.
researchsquare.com
Find digitized publications and collection items through an online library.
tewaharoa.victoria.ac.nz
Open access repository for research outputs from Victoria University of Wellington, New Zealand.
researchgate.net
ResearchGate helps search books, ebooks, papers, library records, or reading archives.
wiki.restarters.net
Restarters helps search books, ebooks, papers, library records, or reading archives.
retinalatina.org
Regional streaming service from retinalatina, focused on films, series, and programmes from supported markets.
retractionwatch.com
Retraction Watch helps search books, ebooks, papers, library records, or reading archives.
retronews.fr
Digital newspaper archive of the BnF.
retrosix.wiki
RetroSix helps search books, ebooks, papers, library records, or reading archives.
pt.revistasdeideias.net
Research project and digital archive of Portuguese cultural magazines.
x.com
Rgvaerialphotos is an educational resource for documentaries, courses, books, reference material, or self-learning.
artbase.rhizome.org
Browse digitized texts, images, archives and cataloged cultural materials.
ringwatchers.com
Ringwatchers is an educational resource for documentaries, courses, books, reference material, or self-learning.
x.com
Ringwatchers is an educational resource for documentaries, courses, books, reference material, or self-learning.