Liên quan Sever Severus Snape Severodvinsk Severnaya Zemlya Severin Hacker Seversky P-35 Severia Severino Zuazo Severo Ochoa Severus II
Tài liệu tham khảo WikiPedia: Sever http://www.astronautix.com/craft/sever.htm http://history.nasa.gov/SP-4225/documentation/mhh/...
