ORIGINAL
Persistent identifier https://phaidra.univie.ac.at/o:1716375
Handle https://hdl.handle.net/11353/10.1716375
URI https://valep.vc.univie.ac.at/virtualarchive/public/JKW_van_Leeuwen_D_Reidel_Publishing_Company_to_Carnap_1970-03-26_L_Original/dv:940548