Persistent identifier https://phaidra.univie.ac.at/o:1528807
Handle https://hdl.handle.net/11353/10.1528807
URI https://valep.vc.univie.ac.at/virtualarchive/public/Neurath_to_Carnap_Rougier_Philipp_Frank_Jrgensen_Morris_1937-09-17_L_Original/dv:846226