1. The National Academies

2. OpenDOAR

3. JSTOR

4. African Journals Online (AJOL)

5. Directory of Open Access Journals – DOAJ

6. IMF eLibrary

7. Bookboon

8. Project MUSE Books

9. Wiley Online Library Full

10. SAGE Journals

11. Taylor & Francis Journals

12. Openbook publishers

13. Project Gutenberg

14. Open knowledge repository

15. Oerafrica