The Columbia Encyclopedia, Sixth Edition. 2001-07.
Leonov, Aleksei Arkhipovich
(l´´yksy´ ärkh´´ypô´vych) (KEY) , 1934, Soviet cosmonaut. While serving as copilot of Voskhod 2 (Mar. 1819, 1964), he became the first person to perform extravehicular activity. Leonov was also command pilot for Soyuz 19 in the Apollo-Soyuz Test Project (July 1521, 1975).