o:1710654
Persistent identifier https://phaidra.univie.ac.at/o:1710653
Handle https://hdl.handle.net/11353/10.1710653
URI https://valep.vc.univie.ac.at/virtualarchive/public/Carnap_to_Springer-Verlag_Erna_Ungersbck_1963-12-11_L/d:940003