| 1 | https://doabooks.org |
| 2 | www.openknowledge.worldbank.org/ |
| 3 | https://epgp.inflibnet.ac.in/ |
| 4 | www.oapen.org/ |
| 5 | www.academictutorials.com |
| 6 | https://www.pdfdrive.com/tata-mcgraw-hill-books.html/ |
| 7 | https://librivox.org/ |
| Open Access Journals |
| 1 | https://doaj.org/ |
| 2 | https://www.cambridge.org/core/what-we-publish/open-access |
| 3 | https://projecteuclid.org/librarians/lib_oa |
| 4 | https://www.ias.ac.in/ |
| 5 | https://www.oalib.com/ |
| 6 | https://www.ssrn.com/index.cfm/en/ |
| 7 | https://agris.fao.org/agris-search/index.do |
| 8 | https://www.springeropen.com/ |
| 9 | https://www.ncbi.nlm.nih.gov/pmc/ |
| 10 | https://authorservices.wiley.com/open-research/open-access/index.html |
