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20 Publishing house offers free data bases

20 Publishing house offers free data bases


20 international publishing house offers free data bases for almost a period of two months


5. SCIENCE OPEN scienceopen.com 
8. (OAL)OPEN ACCESS LIBRARY oalib.com


13. OMNICS OPEN ACCESS omicsonline.org 

16. COGENT OA cogentoa.com 
17. OPEN ACCESS omicsonline.org 
20. DIRECTORY OF OPEN SCIENCE ARTICLES doaj.org
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