42Tagebuch 28. XII. 1937 – 20. XII. 1938 [Rudolf Carnap: Tagebücher], Eintrag Fr 26. VIII. 1938

Enzykl.B1939@„Foundations of Logic and Mathematics“, Foundations of the Unity of Science 1 (3), 1939IFoundations of the Unity of Science– Abends Rücken schwach.