Persistent identifier https://phaidra.univie.ac.at/o:1714768
Handle https://hdl.handle.net/11353/10.1714768
URI https://valep.vc.univie.ac.at/virtualarchive/public/Robert_A_Landau_RR_Bowker_Company_to_Carnap_1969-10-31_L_Original/dv:953877