TY - CHAP A1 - Haug, Sonja A1 - Kreuter, Frauke T1 - Empirical Social Research between Naïve Realism and Instrumentalism T2 - Karl Popper 2002 Centenary Congress, Karl Popper Institut der Universität Wien, 3.-7.7.2002, Wien Y1 - 2002 ER -