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			 Description 
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			 DOAJ 
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			 Directory of Free Journals with link to over 2000 journals 
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			 Freebooks4doctors 
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			 Contains 365 free medical E-books 
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			 Free Medical Journals 
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			 Available 1447 free medical journal online in fulltext 
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			 BioMedCentral 
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			 BMC has an evolving portfolio of some 300 peer-reviewed journals, sharing discoveries from research communities in science, technology, engineering and medicine. 
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			 Directory of Open Access Books 
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			 12473 Academic peer-reviewed books and chapters from 278 publishers 
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			 Irandoc 
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			 Access to scientific information: thesis, research projects, conferences, articles of Iran 
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			 Pubmed 
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			 Access to over 15 million citations from MEDLINE and additional life sciences journals and other NCBI molecular biology resources 
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			 SID 
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			 Access to 374 Iranian journals in all fields 
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			 Trip Database 
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			 Clinical search tool allow health professionals identify clinical evidence for clinical practice 
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			|  Google Scholar | 
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			Is a Web search engine that index academic resources in all subject fields 
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