الخميس، 13 فبراير 2020

محركات بحث علمية

التصنيفات

محركات بحث علمية

http://www.theses.fr/
https://scholar.google.fr/
http://www.freefullpdf.com/#gsc.tab=0
http://www.dart-europe.eu/basic-search.php
https://www.scienceresearch.com/scienceresearch/desktop/en/search.html
https://isidore.science/
https://www.science.gov/
http://oaister.worldcat.org/
http://worldwidescience.org/
https://eric.ed.gov/
http://www.virtuallrc.com/
http://www.jurn.org/#gsc.tab=0
https://academic.microsoft.com/home
https://www.loc.gov/
https://www.refseek.com/
http://citeseerx.ist.psu.edu/index
https://www.sciencedirect.com/
http://www.academicinfo.net/subject-guides
https://community.libguides.com/
https://www.archives.gov/research/catalog
https://www.base-search.net/
https://www.deepdyve.com/