67. IPUMS TERRA (Terra Populus: Integrated Data on Population and Environment) Bookmark Format Data archive or collection
68. Low- and Middle-Income Country Primary Health Care Expenditures Bookmark Format Series - completed
76. Oxford Supertracker The Global Directory for COVID Policy Trackers and Surveys Bookmark Format Data archive or collection
80. Polity V: Political Regime Characteristics and Transitions, 1800-2018 Bookmark Format Series - ongoing