. "Tracz, Vitek"@en . "Vitek Tracz"@en . "Vitek Tracz (born 31 May 1940) is a London-based entrepreneur who has been involved in science publishing, pharmaceutical information and mobile phone-based navigation."@en . . . . . . . "1940-05-31Z"^^ . "London-based publishing entrepreneur" . . . . . . "1940Z"^^ . .