پایگاه های اطلاعاتی رایگان

Description	Logo	Database
Directory of Free Journals with link to over 2000 journals	DOAJ	https://www.doaj.org
gray's anatomy online access	Gray's Anatomy	https://www.bartleby.com/107
contains 365 free medical E-books	freebooks4doctors	http://www.freebooks4doctors.com
available 1447 free medical journal online in fulltext	Free Medical Journals	http://www.freemedicaljournals.com/
Access to scientific information: thesis, research projects, conferences, articles of Iran	Irandoc	https://irandoc.ac.ir/
contains descriptive information of 95320 journals	JournalSeek	http://www.journalseek.net/
Access to over 15 million citations from MEDLINE and additional life sciences journals and other NCBI molecular biology resources	Pubmed	https://pubmed.ncbi.nlm.nih.gov/
access to 374 Iranian journals in all fields	SID	https://www.sid.ir/
is a Web search engine that index academic resources in all subject fields	Google Scholar	https://scholar.google.com/schhp?hl=en&tab=ws
Powerfull search engine index over 350 million scientific items includes journal sources, institutional repositories, pre-print server material, scientific web pages and much more	Scirus	https://www.elsevier.com