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2por Weber, Ralph EdwardMaterias: “…Cryptography United States History To 1900.…”
Publicado 2002
Libro electrónico -
3por Burns, Thomas L.Materias: “…United States. National Security Agency History…”
Publicado 2005
Libro electrónico -
4Publicado 2001Materias: “…Soviet Union. Komitet gosudarstvennoĭ bezopasnosti History…”
Libro electrónico -
5por Williams, JeannetteMaterias: “…United States. National Security Agency History…”
Publicado 2001
Libro electrónico -
6Publicado 2013Materias: “…Military intelligence United States History 20th century…”
Libro electrónico -
7por Friedman, William F. 1891-1969Materias: “…Cryptography United States History…”
Publicado 2006
Libro electrónico -
8por Clabby, John F., 1950-“…United States History, Military 20th century…”
Publicado 2007
Libro electrónico