Persistent identifier https://phaidra.univie.ac.at/o:1716380
Handle https://hdl.handle.net/11353/10.1716380
URI https://valep.vc.univie.ac.at/virtualarchive/public/Carnap_to_JKW_van_Leeuwen_D_Reidel_Publishing_Company_1970-04-02_L_Copy/dv:940550