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found: LCCN 63-10013: His Elements of mathematical logic, 1964, c1963 (hdg.: Łukasiewicz, Jan)
found: LC data base, 12-20-83 (hdg.: Łukasiewicz, Jan; usage: Jan Łukasiewicz)
found: Modalʹnye teorii I͡Ana Lukasevicha, 2001: t.p. (I͡Ana Lukasevicha)
found: Philosophy pages WWW Site,22 Mar. 2007 (Jan Łukasiewicz, 1878-1956)