Many Universities have institutional Repositories
They can and often do archive:
- Dissertations & Theses
- Working Papers
- Pre-print versions of articles by faculty starting to go through the official publishing process
- Try the following Google advanced search: Domain:edu dissertations
- Try the following Google advanced search: site:harvard.edu "working papers"
Non-Governmental Organizations (NGOs)
- If it's a scholarly society that runs conferences, they may have working papers and conference proceedings
- 'Think tanks' may make reports and white papers available
- Try the following Google advanced search: Domain:org "working papers"
- Try the following Google advanced search: site:rice.edu "working papers"
- You can also add additional keywords about your topic to narrow your search
- Remember that any sort of organization can use the .org domain extension ; make sure it's a legitimate, relevant organization*
*Years ago, a white supremacist organization published a .org website about Martin Luther King Jr., but of course added fake info to it to lead people, especially little schoolkids, astray. By the way, if you go to look at the site out of curiosity....be aware that you'll help raise it in the rankings so that more people may be likely to see it.