Thực đơn
Rockwell-MBB X-31 Tham khảo|month=
(trợ giúp)Thực đơn
Rockwell-MBB X-31 Tham khảoLiên quan
Tài liệu tham khảo
WikiPedia: Rockwell-MBB X-31 http://www.esteco.com/home/by_esteco/esteco_applic... http://abyss.uoregon.edu/~js/space/lectures/x-plan... http://history.nasa.gov/monograph31.pdf http://nix.larc.nasa.gov/search;jsessionid=7n7121u... http://www.nasa.gov/centers/dryden/news/FactSheets... //www.worldcat.org/issn/0959-7050 https://web.archive.org/web/20110927085630/http://... https://commons.wikimedia.org/wiki/Category:Rockwe...