English: Sao Tome and Principe Export Treemap from MIT Harvard Economic Complexity Observatory
日付
原典
Economic Complexity Observatory, MIT Media Lab and the Center for International Development at Harvard University. (TC) http://atlas.media.mit.edu/
作者
R. Haussmann, Cesar Hidalgo, et.al. Creative Commons Attribution - Share Alike 3.0 Unported license. See permission to share image on web at: http://atlas.media.mit.edu/about/permissions/