ERIC.gov: Provides comprehensive access to education-related literature, including citations to articles and research reports. Includes some fulltext. Free public version.

PubMed Central: PubMed Central® (PMC) is a free full-text archive of biomedical and life sciences journal literature at the U.S. National Institutes of Health’s National Library of Medicine (NIH/NLM).

OpenKnowledge@NAU: Search for works authored by the NAU community.

WorldCat: Find items in a library near you.

OpenDOAR (Directory of Open Access Repositories): OpenDOAR is a directory of open access repositories.

DOAJ (Directory of Open Access Journals): DOAJ is a community-curated online directory that indexes and provides access to high quality, open access, peer-reviewed journals. DOAJ is independent.

DOAB (Directory of Open Access Books): Academic peer-reviewed books and chapters from 282 publishers.