Query4All.com
Index of party
Data generated from past analysis.
https://www.jstor.org/stable/2129370
https://www.jstor.org/stable/1963951
https://www.laroses.net/party/
https://www.instagram.com/indexpoolparty/
https://scholar.harvard.edu/saldin/data
https://aceproject.org/main/english/pc
https://cses.org/data-download/download-data-documentation/party-system-polarization-index-for-cses-modules-1-4/
https://www.w3.org/Icons/Party/
https://journals.sagepub.com/doi/10.1177/1354068813509525