https://www.wikipedia.com
https://earth.google.com
https://www.cia.gov/cia/publications/factbook/index.html
https://www.susning.nu


Artiklar:

Aerospace:
http://www.svd.se/dynamiskt/utrikes/did_13356368.asp
http://www.nyteknik.se/art/46470
http://www.nyteknik.se/art/46126
http://www.nyteknik.se/art/46038
http://www.nyteknik.se/art/45887
http://www.nyteknik.se/art/46006
http://www.nyteknik.se/art/42725
http://www.nyteknik.se/art/42606
http://www.nyteknik.se/art/39628
http://www.nyteknik.se/art/43341