General Research Tools
(for preliminary research, scanning the literature, refining the topic)

• Catalyst (virtual browse; subject heading)
• Library Article Search Tools

Further Research Tools
(finding articles in specific fields, related articles, grey literature)

• SSCI,  Scopus, Google Scholar (for citation tracking)
• Dissertations and Theses Global
• Proquest Congressional and Presidential Library (US government documents)
• CQ Researcher, CRS Reports, Policy Files, GAO (for reports on policies and issues)
• Statistical data (Statista; Social Explorer; Statistical Insight)
• News and Newspapers 
• East Asian language sources