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WikiPedia: Tupolev_Tu-4 http://www.nationalmuseum.af.mil/factsheets/factsh... http://www.airliners.net/open.file?id=1170866&size... http://www.airliners.net/open.file?id=1205559&size... http://www.airliners.net/open.file?id=1213817&size... http://www.airliners.net/search/photo.search?front... http://fas.org/man/dod-101/sys/ac/row/aew-prc.htm http://fas.org/man/dod-101/sys/ac/row/china_gt_air... http://www.fas.org/nuke/guide/russia/bomber/tu-4.h... http://lend-lease.airforce.ru/english/articles/geu... https://commons.wikimedia.org/wiki/Category:Tupole...