University Publications of America, 1989. — 48 p.
Soon after declassif¡cation of selected communications intelligence material from World War II was undertaken by the National Security Agency in the late 1970s, many valuable documents were made available to researchers in the National Archives. An early scholar of this material, the late Ronald Lewin, said to the press in Washington, D.C., in 1981, "If I were writing a Ph.D. [dissertation], I'd rush over to Archives this minute." Since then much more material has been declassified; some of the Top Secret Studies in this collection of microfilm were declassified only in the late 1980s.
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