Persistent identifier https://phaidra.univie.ac.at/o:1707881
Handle https://hdl.handle.net/11353/10.1707881
URI https://valep.vc.univie.ac.at/virtualarchive/public/John_Kemeny_to_Haim_Gaifman_Carnap_1963-04-30_L_Copy/dv:944331