List of IGOs and CountriesSource:
Correlates of War Project. 2017. “State System Membership List, V2016.” https://correlatesofwar.org/data-sets/state-system-membership.
Pevehouse, Jon CW, Timothy Nordstrom, Roseanne W McManus, and Anne Spencer Jamison. 2020. “Tracking Organizations in the World: The Correlates of War IGO Version 3.0 Datasets.” Journal of Peace Research 57 (3): 492–503. https://doi.org/10.1177/0022343319881175.