\input{Briefe/1931/1931-02-16-Wittgenstein-an-Carnap-a}
\input{Briefe/1932/1932-08-08-Wittgenstein-an-Schlick-a}
\input{Briefe/1932/1932-08-20-Wittgenstein-an-Carnap-a}
\input{Briefe/1932/1932-09-28-Carnap-an-Wittgenstein-a}