Databases are used to find information on a specific topic. The document types covered in databases include journal articles, books, book chapters, theses, dissertations, editorials, conference proceedings, patents, trade magazines, newspapers, reports, reviews and more.
Subject-Specific databases will help to find a lot of articles on a smaller range of subjects while General/Multidisciplinary databases will help to find some articles on a lot of topics.
If you need help in selecting the relevant databases(s) for your topic, do email me for a research consultation.
Many universities and research organisations make their working papers freely available on their websites. If you know of a University department, research centre or think tank that is doing research in your topic, check out their website. Many websites categorized their working papers under the headings "Research" or "Publications" or "Working papers". Below are some examples: