File: country_key.csv

Source1: International Organization for Standardization
Title:	Country Codes Collection
URL:	https://www.iso.org/obp/ui/#iso:pub:PUB500001:en
Date:	Unknown
Accessed:	11 April 2024

Source2: Pickering, Bryn, Francesco Lombardi, and Stefan Pfenninger. "Diversity of options to eliminate fossil fuels and reach carbon neutrality across the entire European energy system." Joule 6, no. 6 (2022): 1253-1276.

