Persistent identifier https://phaidra.univie.ac.at/o:1685252
Handle https://hdl.handle.net/11353/10.1685252
URI https://valep.vc.univie.ac.at/virtualarchive/public/Morris_to_Neurath_Philipp_Frank_Carnap_Reichenbach_1941-09-29_L_Copy/dv:952849