ORIGINAL
Persistent identifier https://phaidra.univie.ac.at/o:1684830
Handle https://hdl.handle.net/11353/10.1684830
URI https://valep.vc.univie.ac.at/virtualarchive/public/Institute_for_the_Unity_of_Science_Philipp_Frank_to_Morris_1949-08-12_L_Original/dv:952541