"All textbooks are either used at multiple higher educational institutions, or affiliated with an institution, scholarly society, or professional organization." Maintained by the University of Minnesota.
The Council of Chief State School Officers. CC BY 4.0. 3 mins 48 secs.
Repository for journal articles, books, data, research, reports, and any other information about Open Educational Resources (OER). This searchable database is updated and maintained by professional librarians and volunteers. The data is fully searchable and all resources are either fully extractable from the cloud or are linked with a relevant URL.