Problems and theories of philosophy. Translated by Henryk Skolimowski and Anthony Quinton. Zagadnienia i kierunki filozofii. English Ajdukiewicz, Kazimierz. Knowledge, Theory of. Metaphysics. BD166 .A413 101 AJP Translation of Zagadnienia i kierunki filozofii. Bibliography: p. xix. [London, New York] Cambridge University Press [1973] [1973] 1973 Text xxiii, 170 p. http://www.loc.gov/catdir/enhancements/fy0909/72097878-d.html http://www.loc.gov/catdir/enhancements/fy0909/72097878-t.html eng engpol