. . . . "1994-08-05Z"^^ . . . "1907-04-03Z"^^ . . . . "1907Z"^^ . "American cryptographer" . . "Solomon Kullback"@en . . . "Kullback, Solomon"@en . . "1994Z"^^ . "Solomon Kullback (1907 \u2013 1994) was an American cryptanalyst and mathematician, who was one of the first three employees hired by William F. Friedman at the US Army's Signal Intelligence Service (SIS) in the 1930s, along with Frank Rowlett and Abraham Sinkov. He went on to a long and distinguished career at SIS and its eventual successor, the National Security Agency (NSA)."@en .