2.2.) "CIA World Factbook", Link: https://www.cia.gov/the-world-factbook/

2.3.) "RetroLib", Retrobibliothek, Link: https://www.retrobibliothek.de/retrobib/index.html

2.4.) "Wikipedia", in Deutsch und Englisch, Link: https://de.wikipedia.org/wiki/Hauptseite

2.5.) "World Statesmen", Link: https://www.worldstatesmen.org/

2.6.) "Vexilla Mundi", Link: http://www.vexilla-mundi.com/

2.7.) "University of Texas Libraries", Link: https://legacy.lib.utexas.edu/maps/

2.8.) "Deutsches Koloniallexikon",
Link: https://archive.org/details/deutscheskoloni00schngoog/mode/2up