Index to Online Free Access Abstract/Full-text Research Databases
(Linkages are arranged in alphabetical order)

• arXiv offers scholarly articles in the fields of physics, mathematics, computer science, quantitative biology, quantitative finance, statistics, electrical engineering and systems science, and economics. Materials on this site are not peer-reviewed by arXiv. Go visit at: https://arxiv.org/
• BASE Bielefeld Academic Search Engine is operated by the Bielefeld University Library in Germany, and it offers more than 100 million documents from more than 4,000 sources. Sixty percent of its content is open access. Go visit at: https://www.base-search.net/
• BioMed Central provides open access to high quality peer-reviewed journals including broad interest titles such as BMC Biology and BMC Medicine, specialist journals such as Malaria Journal and Microbiome, and the Go visit at: BMC Series. https://www.biomedcentral.com/
• CIA Central Intelligence Agency. Go visit at: https://www.cia.gov/library/publications/the-world-factbook/geos/xx.html
• CORE the world’s largest collection of open access research papers. Go visit at: https://core.ac.uk/
• DBLP Computer Science Bibliography provides open bibliographic information on major computer science journals and proceedings. Go visit at: https://dblp.org/
• Digital History. Go visit at: http://www.digitalhistory.uh.edu/
• DLC Digital Library of the Commons provides  free and open access to full-text articles, papers, and dissertations. Go visit at:  http://dlc.dlib.indiana.edu/dlc/
• DOAJ Directory of Open Access Journal Go visit at: https://doaj.org/
• DRYAD is a digital repository of curated, open access scientific research. https://datadryad.org/stash
• ERIC Education Resources Information Center https://eric.ed.gov/
• EThOS e-Theses Online Service search over 500,000 doctoral theses. Download instantly for your research, or order a scanned copy quickly and easily. Go visit at: https://ethos.bl.uk/Home.do
• JURN provides links to various scholarly websites, articles, and journals that are all free access or open access. Specifically covering the fields of the arts, humanities, business, law, nature, science, and medicine, JURN has indexed almost 5,000 repositories to help you find exactly what you’re looking for. Go visit at: http://www.jurn.org/#gsc.tab=0
• JURN Directory An organised links directory for the arts & humanities, listing selected open access or otherwise free e-journals. Go visit at: http://www.jurn.org/directory/
• Public Library of Science (PLOS) an Open Access publisher empowering researcher to accelerate progress in science and medicine by leading a transformation in research communication. Go visit at: https://plos.org/
• National Criminal Justice Reference Service. Go visit at: https://www.ncjrs.gov/
• PubMed comprises more than 30 million citations for biomedical literature from MEDLINE, life science journals, and online books. Go visit at: https://pubmed.ncbi.nlm.nih.gov/
• Science Open. Go visit at: https://www.scienceopen.com/
• Semantic Scholar harnesses the power of artificial intelligence to efficiently sort through millions of science-related papers based on your search terms. According to the site, although some articles are behind paywalls, “the data [they] have for those articles is limited,” so you can expect to receive mostly full-text results. Another feature is the extensive advanced search options, which allow you to search by cell type and brain region, among other things. Go visit at: https://www.semanticscholar.org/?gclid=Cj0KEQiAkO7CBRDeqJ_ahuiPrtEBEiQAbYupJfG10GEbuSyABnQkt3G-wMpzMcw1Q01zzAr3aOvl8-QaAtUr8P8HAQ
• SSRN’s e-Library provides 939,099 research papers from 489,549 researchers in more than 50 disciplines. Go visit at: https://www.ssrn.com/index.cfm/en/