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BioMed Central (advanced search log in)
BioMed Central is an independent publishing house that provides open access to peer-reviewed biomedical research.
Directory of Open Access Journals
Get free access to thousands of scholarly journals on all kinds of topics.
The Public Library of Science (PLoS) is a nonprofit organization committed to making the world’s scientific and medical literature freely available online, without restrictions on use or further distribution, free from private or government control.
Royal Society Publishing Free Archive Get open access back issues of journals covering science and other topics.
Short List of Periodicals on the Web
Compiled by staff at the Library of Congress, this site lists selected current periodicals freely available on the Web.