للبحوث والأوراق العلمية والمراجع ..
1_http:// education.iseek.com/iseek/ home.page
2_ http://www.refseek.com/
3_http://m.wolframalpha.com/
4_http:// academic.research.microsoft .com/
5_ https://www.highbeam.com/
6_http://www.siris.si.edu/
7_ http://www.worldcat.org/
8_ http://archiveshub.ac.uk/ index.html
9_ http://www.archiefnet.nl/ index.asp?taal=en
10 _http:// worldwidescience.org/ indextext
11_http://www.sciseek.com/
12_ https://openlibrary.org/
13_ http://www.ojose.com/
14 _ http://link.springer.com/
15 _ https:// scholar.google.com.eg/
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2_ http://www.refseek.com/
3_http://m.wolframalpha.com/
4_http://
5_ https://www.highbeam.com/
6_http://www.siris.si.edu/
7_ http://www.worldcat.org/
8_ http://archiveshub.ac.uk/
9_ http://www.archiefnet.nl/
10 _http://
11_http://www.sciseek.com/
12_ https://openlibrary.org/
13_ http://www.ojose.com/
14 _ http://link.springer.com/
15 _ https://
المصدر
Summer Training & Jobs
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