europepmc.org
Research index for locating articles, books, authors and citation information.
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inpress.lib.uiowa.edu
Research index for locating articles, books, authors and citation information.
fictiondb.com
Research index for locating articles, books, authors and citation information.
library.frick.org
Online catalog of the Frick Art Reference Library.
gesamtkatalogderwiegendrucke.de
Research index for locating articles, books, authors and citation information.
gbd.digital
Research index for locating articles, books, authors and citation information.
hapi.ucla.edu
Research index for locating articles, books, authors and citation information.
heiup.uni-heidelberg.de
Academic publisher of Heidelberg University for open access publications of outstanding research results.
informnapalm.org
Research database covering Russian aggression, military activity, and related open-source evidence.
theiet.org
Research index for locating articles, books, authors and citation information.
openlibraryenvironment.org
Research index for locating articles, books, authors and citation information.
lingmex.colmex.mx
Research index for locating articles, books, authors and citation information.
niederdeutsche-literatur.de
Research index for locating articles, books, authors and citation information.
ludap.lu
Research index for locating articles, books, authors and citation information.
monoskop.org
Research index for locating articles, books, authors and citation information.
nier.repo.nii.ac.jp
Find digitized publications and collection items through an online library.
opac.pnm.gov.my
Research index for locating articles, books, authors and citation information.
otzarhasefer.com
Research index for locating articles, books, authors and citation information.
inist.fr
Research index for locating articles, books, authors and citation information.
sigb.net
Research index for locating articles, books, authors and citation information.
reddeerpress.com
Research index for locating articles, books, authors and citation information.
rtabstracts.org
Research index for locating articles, books, authors and citation information.
Nonprofit organization offering digital collections and tools for locating research on musical topics.
recercat.cat
Find digitized publications and collection items through an online library.